@djjd62,
Jeff Dunham: I haven't seen his latest thing and I haven't felt compelled to watch it. But as a stand up comedian, he can be kind of funny if taken in bite size portions. Okay, 2 or 3 minutes at a time.
Dane Cook: I kind of like him. He's not the rock star of comedy though the media and himself love to emphasize that portrayal. His last special was particularly funny and kind of touching when he talked about his recently deceased father.
Gallagher is a PG rated version of George Carlin. It's been quite awhile since I seen one of his specials. He maybe guilty of being comedically obsolete more then anything else. During the peak of his career, he was pretty funny though he could have toned down his "smashing" gimmick based routine