I was curious, so thanks to Master Unit List I compiled the Omnis available to each major power in the IlClan era except for the Republic (who have a ton, but…).
Capellan Confederation
Unit Tonnage Tech Base GĂșn 20 Inner Sphere Coyotl 40 Clan Strider 40 Inner Sphere Firestarter 45 Inner Sphere Avalanche 50 Inner Sphere Blackjack 50 Inner Sphere Men Shen 55 Inner Sphere Lupus 60 Clan Ebon Jaguar 65 Clan Vandal 65 Inner Sphere Grand Summoner 70 Clan Sunder 90 Inner Sphere
Federated Suns
Unit Tonnage Tech Base Adder 35 Clan Coyotl 40 Clan Blackjack 50 Inner Sphere Centurion 50 Inner Sphere Stormcrow 55 Clan Inferno 75 Inner Sphere Templar 85 Inner Sphere Sunder 90 Inner Sphere
Draconis Combine
Unit Tonnage Tech Base Raptor 25 Inner Sphere Arctic Cheetah 30 Clan Owens 35 Inner Sphere Strider 40 Inner Sphere Firestarter 45 Inner Sphere Shadow Cat 45 Clan Avalanche 50 Inner Sphere Blackjack 50 Inner Sphere Centurion 50 Inner Sphere Wendigo 50 Clan Stormcrow 55 Clan Ebon Jaguar 65 Clan Sunder 90 Inner Sphere Tenshi 95 Inner Sphere
Free Worlds League
Unit Tonnage Tech Base Owens 35 Inner Sphere Strider 40 Inner Sphere Shadow Cat 45 Clan Avalanche 50 Inner Sphere Blackjack 50 Inner Sphere Huntsman 50 Clan Sarath 50 Inner Sphere Wendigo 50 Clan Lupus 60 Clan Perseus 75 Inner Sphere
Lyran Commonwealth
Unit Tonnage Tech Base Arctic Fox 30 Inner Sphere Adder 35 Clan Coyotl 40 Clan Ice Ferret 45 Clan Firestarter 45 Inner Sphere Centurion 50 Inner Sphere Gauntlet 55 Inner Sphere Sojourner 60 Clan Crossbow 65 Clan Sunder 90 Inner Sphere Hauptmann 95 Inner Sphere