Okay, Aoshi, we'll play your game. We'll be logical about this.
The Hulk's power is his rage. When he gets angry the large amounts of adrenaline set into his body will begin to mutate his cells, thus causing him to turn green in color and his muscles to grow into superhuman sizes. Of course, since his power is his rage, the angrier he gets, the stronger and bigger he gets. Thankfully (for him), he is put into situations where his anger can increase- such as pain from enemies attacks, someone he cares about being harmed, etc. Now, due to his muscle size increase, his muscles become almost impossible to penetrate (Note: Bullets have as much penetrative power as a sword if not more) and if his muscles continue to increase in size, there would probably be nothing that can actually harm the dude and possibly nothing that could stop him considering the fact that he gets stronger as well. Now, put him in DMC's situation:
Mundus: I will kill all humanity.
Hulk: HULK SMASH! *Smashes Mundus to bits*
Savior: Roooaaarr!
Hulk: HULK SMASH! *Smashes Savior to bits*
Arkham: I have the power!
Hulk: HULK EAT MUTATED JELLY BEAN!
As for Dante and Vergil, all they do is shoot and slash, get stabbed and survive, and that's it. We haven't seen them get any stronger except for getting a power boost from somewhere (Vergil actually got weaker when he turned corrupted, may I mind you). So, really, there's nothing much to them. In fact, I could easily say that there is nothing that they can do that can defeat the Hulk.
Now, that's fictional logic. If you want REAL logic, that I shall state that you, my kind sir, are an idiot. You can't put any REAL logic into this thread. Attempting to do so makes you look more like a retard than a fanboy. You even ask for logic, yet you don't pull any crap at all! And that angers me to no end. So I'm going to be straight with you. Me and other people have been nice with you so far, but I'm going straight-forward: You are a fanboy, who just wants to make his favorite characters look like gods. There is no point in this thread. You haven't entertained us with any actual good arguments, and in all truth, you made this thread more pointless than interesting. With that, I shall take my leave.