I guess sentry since he was able to overpower strange. Gosh I hate sentry. And i'm guess that since sentry can get out of the micro verse because of sheer power that puts him above them too. thor could get out of the micro verse though magic which is not the same as sheer force of will.
doesnt quasar have better feats then thor. Quasar droped a VERY BIG construct on thanos in the IG saga that might have normally killed him had he not had the IG, i dont think thor can come near to anything like that with out almost killing himself.
Quaser is definately more powerful than the other two.
The thing is, his powers are useless against Thor, when he uses his hammer (the whole magic thing), so, as much feats as he has, that rules out him beating Thor.
Quasar has the best feats out of the three, but my vote goes to Sentry because of his powerset, and the fact that "Marvel hasn't really tapped into all the things he can do". (this is a direct quote from Joe Quesada during a book singing recently)
The fact that he's been clearly shown above herald level, where Thor and Quasar are. Beating Terrax easier than Thor or Quasar could ever dream of doing, stalemating the Collective who owned Binary in 2 pages, a herald leveler in her own right, nearly stalemating Photon Genis who was shown above heralds as well, beating Dr. Strange, as well as his alter ego and exact equal in power stalemating and eventually getting the better of the combined forces of the FF, New Avengers, Astonishing X-Men, SHIELD, Inhumans (including Black Bolt), Dr. Strange, and Namor, and owning the Hulk in a page, breaking every bone in his body easily. Yea, Sentry's quite a bit above Quasar and Thor.
Funny, I'm a big genis fan. As a matter of fact he's my second favorite MU character behind Nightcrawler. And I don't recall anything putting him above all heralds