Chaos Knight
[wiki] rating: 1.0 (winrate: 52% pickrate: 3%)Phantom Lancer
[wiki] rating: 1.0 (winrate: 51% pickrate: 10%)Ogre Magi
* Ogre Magi has no AoE damage or disables and has nothing to deal with Phantom Lancer's illusions.
* 
Doppelganger disjoints and dispels Ignite.
Oracle
[wiki] rating: 1.0 (winrate: 51% pickrate: 10%)Ogre Magi
* 
Fate's Edict gives full immunity from Ogre Magi's mostly magical damage.
* 
Fortune's End can dispel Ignite (when used on allies) and Bloodlust (when used on enemies).
* 
False Promise can dispel Ignite and Fireblast.
Undying
[wiki] rating: 1.0 (winrate: 50% pickrate: 4%)Ogre Magi
* Undying saps strength from heroes with Decay, and Ogre Magi's high strength gain will allow Undying to steal more and more strength, becoming stronger with each use.
* Due to the Strength steal from Decay, Undying is normally very tanky, and has high health, making it harder for Ogre Magi to kill him.
Anti-Mage
[wiki] rating: 1.0 (winrate: 49% pickrate: 13%)Ogre Magi
* Ogre Magi only deals magical damage, which Anti-Mage is exceptionally resistant due to Counterspell.
* Anti-Mage dispels 
Ignite with 
Manta Style.
* Ogre Magi has a very large mana pool which means Anti-Mage can do large amounts of damage to him with Mana Break and Mana Void.
Lifestealer
[wiki] rating: 1.0 (winrate: 48% pickrate: 5%)Ogre Magi
* Ogre Magi has nothing against 
Rage and his high health pool amplifies 
Feast.
Additional:
* Lifestealer's Rage makes him immune to all of Ogre's magical debuffs and also dispels them.
* Ogre's as hero with great durability and high health is great target for Lifestealer in any stage of the game, thanks to Feast.
Slark
[wiki] rating: 1.0 (winrate: 48% pickrate: 13%)Ogre Magi
* 
Dark Pact dispels Ignite's slow and Fireblast's stun.
* 
Shadow Dance allows Slark to regenerate HP, even when he is affected by Ignite and Fireblast.
Omniknight
[wiki] rating: 1.0 (winrate: 47% pickrate: 1%)Ogre Magi
* 
Heavenly Grace reduces Fireblast stun time and dispels Ignite.
* 
Purification can heal damaged hero if needed.
Viper
[wiki] rating: 1.0 (winrate: 47% pickrate: 6%)Ogre Magi
* 
Nethertoxin breaks Multicast.
* 
Corrosive Skin minimizes the damage during Ignite and Fireblast.
Meepo
[wiki] rating: 1.0 (winrate: 45% pickrate: 1%)Ogre Magi
* Ogre Magi has single-targeted magical-only damage and disables and is less effective against Meepo's clones.
Doom
[wiki] rating: 1.0 (winrate: 44% pickrate: 2%)Ogre Magi
* 
Doom makes Ogre Magi less disruptive.
* 
Infernal Blade effectively negates Ogre Magi's tankiness.
* With 
Aghanim's Scepter he can disable Multicast.
Arc Warden
[wiki] rating: 0.6 (winrate: 54% pickrate: 4%)Ogre Magi
* 
Arc Warden's 
Tempest Double is helpful for killing Ogre Magi who lacks AoE damage and disables.
Puck
[wiki] rating: 0.6 (winrate: 52% pickrate: 17%)Ogre Magi
* 
Puck silences Ogre Magi with 
Waning Rift, and 
Phase Shift makes Puck untargetable for the duration.
Abaddon
[wiki] rating: 0.6 (winrate: 52% pickrate: 5%)Ogre Magi
* In general, heroes that deal burst in multiple instances will trigger Borrowed Time and heal Abaddon for a large amount, such as 
Skywrath Mage, 
Techies, 
Juggernaut, 
Shadow Shaman, or 
Ogre Magi.
Winter Wyvern
[wiki] rating: 0.6 (winrate: 49% pickrate: 7%)Ogre Magi
* 
Winter Wyvern's 
Winter's Curse works very well against the increased attack speed from Bloodlust.
Earth Spirit
[wiki] rating: 0.6 (winrate: 48% pickrate: 10%)Ogre Magi
* 
Earth Spirit's useful kit of Slows, Stuns, and Silences can set up kills on Ogre Magi and the silence can stop him from using his abilities.
Legion Commander
[wiki] rating: 0.6 (winrate: 47% pickrate: 11%)Ogre Magi
* Heroes rely on their debuff to control the opponent will have a hard time against Press the Attack: 
Venomancer, Earth Spirit, Ogre Magi
Nature's Prophet
[wiki] rating: -1.0 (winrate: 44% pickrate: 5%)Ogre Magi
* Nature's Prophet treants can easily cleared by damage-over-time Ignite or Multicast 
Hand of Midas earning lots of gold.
* Fireblast and Unrefined Fireblast prevents or cancels out Nature Prophet from escaping with 
Teleportation.
Mars
[wiki] rating: -1.0 (winrate: 48% pickrate: 16%)Ogre Magi
* Mars has no way to trade with Ogre Magi in the early game thanks to his high base health, resistance and Ignite.
* Once Ogre Magi gets level 2 he may also have 
Bloodlust, which makes him even harder to deal with in lane.
* 
Fireblast can be ridiculously strong later on in the game for controlling Mars.
* Spear of Mars, which is Mars' main source of damage in the early game, cannot guarantee kills early on Ogre Magi.
Earthshaker
[wiki] rating: -1.0 (winrate: 49% pickrate: 12%)Ogre Magi
* Damage-over-time Ignite can prevent Earthshaker from escaping with 
Blink Dagger.
* Fireblast and Unrefined Fireblast are the good setup while Earthshaker after blinking in (although Earthshaker is a primary target).
Templar Assassin
[wiki] rating: -1.0 (winrate: 51% pickrate: 5%)Ogre Magi
* The damage block instances of 
Refraction can be burned down with Ignite.
Weaver
[wiki] rating: -1.0 (winrate: 51% pickrate: 13%)Ogre Magi
* Fireblast with Multicast can prevent Weaver from escaping with 
Shukuchi.
* However, the slow from Ignite is generally useless against Shukuchi haste effect or dispelled by 
Time Lapse.
Io
[wiki] rating: -1.0 (winrate: 51% pickrate: 7%)Ogre Magi
* Ignite has long duration damage-over-time and prevents Io from healing his Tethered ally.
Techies
[wiki] rating: -0.6 (winrate: 48% pickrate: 8%)Ogre Magi
* Techies struggles early game against heroes with naturally large strength and health regeneration such as 
Pudge, 
Axe or Ogre Magi, as the player is forced to lay down more mines than usual to kill these bulkier heroes.
Void Spirit
[wiki] rating: -0.6 (winrate: 50% pickrate: 13%)Ogre Magi
* Side lanes with disables will greatly reduce the likeliness Void Spirit will be willing to rotate: 
Sven, 
Tiny, 
Wraith King, Ogre Magi.
Spirit Breaker
[wiki] rating: -0.6 (winrate: 51% pickrate: 8%)Ogre Magi
* Heroes that can cancel Charge of Darkness: Ogre Magi, 
Earthshaker.
Ogre Magi
*
Phantasm dispels Ignite and makes targeting the real Chaos Knight much harder.