Apocalypse. He doesn't even really need prep time. The guy has been alive for millennia. He has contingency plans for all types of things. He has access to Celestial technology, and is an incredible genius in his own right. The only thing that kept him from taking over the world was the emergence of Charles Xavier onto the mutant world stage. If not for that, Doom would still be just another member of the Human High Council =P
I'd argue logic here, but Dr. Doom is a far well written character than Apoc. Personally, I think there is no comic run that does Apoc justice. However, Doom is Marvel's evil version of Batman, and with the excuse of prep time, Doom fanboys justify a win in every fight.
Round 1 is the tough call. Surfer won't go all out at the start. He'll hold back, as will Thor. So I would say they get taken out early. That leaves MM vs. Sentry. I know Sentry is said to b a powerful telepath as well, but its stated that most of that power is used to maintain his physical form. That combined with his fragile mind, IMO, leaves him vulnerable to someone as powerful as MM. However, I'm open to being corrected on this as I haven't seen all of Sentry's showings and there may be a TP resistance feat I'm not aware of. I wouldn't be surprised. Sentry's got ever other power! LOL. So, for now, I'll go with MM.
Round 2 is easy for Surfer, per below.
Round 1 : MM [New 52 MM seems to be very ruthless]
Jackverine is rather inconsistent,one second a bullet shot from a small arm can KO him next second a shot gun bullet shot to his head only angers him.
Slade takes it IMO,Jackverine has been KOd rather frequently and even normal folk have given him trouble. I see no reason why someone who's stronger,a better fighter and expert weapon user who also happens to have healing/enhanced durability himself shouldn't be able to take him.