Ah, the problem there is me. I'm not a comic fan*, and know pretty much nothing beyond the basic basics (i.e. what Batman and Spider-Man and Superman can do). So if I asked that question I'd end up hearing the names of characters I've never even heard of and wouldn't be able to recommend a Sentinels hero anyway! Yeah, I suck. 
- You're understandably wondering what I'm doing here if I don't like comics. Well, I usually buy the games for my RPG club and it was pointed out that we didn't have a superhero-themed game. I researched, and chose SotM thinking that the guys would like it but it wouldn't be for me. Of course I found out that it's actually awesome and that you don't have to be into the whole superhero thing to love it.