Too much A>B>C logic in this thread. This type of logic doesn't hold up in actual comics and especially when characters have vastly different and versatile power sets.
The argument is essentially Sentry beat up Thor, therefore he'll beat up Surfer.
I've already shown how dumb this logic is using REAL feats/fights. Surfer has beaten or stalemated individuals who have owned Thor e.g., Durok, Hulk, Millenneus, etc. Hence why abc logic doesn't work.
Pr is right when he says Death Sentry has too few feats to judge. His only feat is defeating Thor which wasn't even a stomp, people are just exaggerating. I wouldn't be surprised if Thor ends up beating Death Sentry in the future.
IIRC Taurus from Zodiac knocked Thor out with one punch (more impressive than Sentry's supposed two shot), but later on Thor got his revenge.