Wonder Man is the weakest of the four.
If we're using new Hyperion(the one who held apart planets and survived the end of a universe), then I'd put the order at
Hyperion
Blue Marvel
Gladiator
Wonder Man
If we're using any other version.
Blue Marvel
Hyperion/Gladiator
Wonder Man
And Gladiator's placement also depends on which version, how hard he's jobbing, blah blah blah.