I was originally saving for Beast Eddie but he came out of one of the souls I bought, and I had enough to pick up 7th Son and Clansman. So far I like Beast Eddie the most out of the 3 because of how well he fits on my PvP team, but I don't even have enough XP or Skill Shards to Max out anyone. Clansman seems better than Seventh Son, but that could just be because he's a bit newer, 7th son is like the oldest "new" meta if that makes sense.