Andre Ward would clearly be a great opponent, outside of Stevenson I think he'd bring more than anyone, and he doesn't really have anything keeping him at 168. I highly doubt Pascal would fight Kovalev, and I wouldn't give him much more chance than Cloud or Braehmer(those two I'd give zilch mind you) It's tough but there are only a handful of really good fighters from 160-175, Kovalev-Stevenson is the only superfight to be made without anyone shifting weight, sucks it won't happen.