Also up there: Nova/Richard Rider
Right now the ones that are ACTIVE as HEROES (i.e. not just rulers or good guys who have heroed in the past), I would say are:
Surfer
Thor
Nova
Magneto (yes, he's a hero right now)
Doctor Voodoo
Strange is currently less-powered, Beta Ray Bill is out looking for answers in space, Black Bolt is dead, Gladiator's playing monarch, Adam Warlock's been taken over by Magus, Sentry is not a hero, Banner isn't currently Hulk, Sersi hasn't been seen in awhile, X-man was sucked away somewhere (but we know he's coming back, and he'll be high up there when he does. Likewise Quasar doesn't have a body at the moment but when he does he'll get a spot too), etc. etc.. Most of the traditional big hitters are out of actions or missing or depowered.
Originally posted by marwash22
@ Q99 - "in each heroes respective primes?"
Oooh, I missed that. In that case the list is going to be mostly of people who had a major cosmic power under their control for awhile.
Jean (when she was phoenix but not dark), Rachel Summers (ditto), Thor (with Odinforce), etc..