In the campaign I have, one of my players has, unfortunately, created an overpowered melee-based character. We have one done one run in 4th edition (Just now switched over), and I allowed him to make the character on his own as we had been playing 3rd for a quite a while.
His melee weapon does base 10 damage, and he rolls 19 to hit. This is completely legitimate and broke no rules in the book.
The book says "Just because you can do something, doesn't mean you shouldn't." I agree with this statement, and it's always been my policy when it comes to this, but he completely disagrees with him. The only way to get him to balance his character (Or preferably make another one, I absolutely hate this character), is to pull my power as a GM and make him switch. In which case he would bitch, like crazy. He would complain until I just gave in and let him do whatever. Alternatively, if I continued to put him in legitimate situations in which he cannot do anything else, he would call me out as trying to punish him and single him out.
Keep in mind, normally he's a great guy. It's just this character, and this incident. I'd rather not piss of my close friend, and I'm at an odds at what to do. Any advice would be appreciated.