These would be The OzolithThe Ozolith, Yuna, Grand SummonerYuna, Grand Summoner, and Resourceful DefenseResourceful Defense
Aside from being a human, which is a very relevant creature type in Commander, Modern and basically every other MTG format, Esper Sentinel is good because it reads: Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays X, where X is Esper Sentinels power. Its a bit like Rhystic Study, but the cost can be far higher if youve got things that make humans stronger or you can put +1/+1 counters onto Esper Sentinel
Giving your opponent access to that isn't always ideal, but you get it first, so I think it ends up benefitting you more often than it benefits them
Annihilating Ending Ulamog, the Defiler | Illustration by Chase Stone And thats a wrap
Sadly, while amassing birds is easy, you cant use all your Bird army as a Bird-based board wipe