Sentry could fight both Silver Surfer or Superman ( not at the same time IMO) but either of those two could take out Hulk and Galactus could take out DS so Sentry would get triple team eventually if they match up DS vs Galactus. But it also depends on what condition Galactus is in if he is going up against DS. Either way Team 1 wins Hulks the weak link.
DS would probably have sentry and hulk work to waste a lot of galactus' energy, eventually SS or big blue would K.O. hulk. sentry and DS would peace out supes, sentry and SS would stalemate eachother, this would allow Surfer to get K.O.ed by the O.E. then it would wind up being DS vs. galactus, DS would take out galactus by attrition