Kevin James "Sweat the Small Stuff" is hilarious. For the same reason to me, as DC's stuff is. I can relate to all of it.
As for Dane Cook, I like his material. Some of it isn't funny, but I think he makes thing relate to your memories. Alot of his act is pulled from teen year memories, and that's why he sells so well. Not many people out there are relating to that specific genre the way he does. Not saying others can't, just saying others don't make that their act. Also, DC's "steals" aren't really steals, IMO. I have a hard time explaining this, but IMO, it would be impossible for material not to overlap with all the life experiences people have and amount of comedians out there. Some just are more well known than others.
Carlos is a thief. There's no way around that. His jokes are verbatim from other's acts.