Only played bioshock so far so I can’t say anything about Ellie. Even then Bioshock infinite was the most boring Bioshock to me (mostly the gameplay, and even worse with burial at sea for me). I think I know what @Silvereyes is going to vote for:
I’m going to be honest, I have no idea who Troy Baker is. I’m assuming he is the voice actor for Booker and Joel (I think that’s his name?)