Who are your favourite standup comedians?

I've heard that it's a good habit to watch or listen to comedy just before going to sleep. Better to go to bed when you have just laughed. You'll forget most of the stressful stuff that might have happened during the day and fall asleep faster.

My knowledge of standup scene is quite limited, I haven't watched much standup ever. So feel free to tell your recommendations.

My current favourites are Doug Stanhope and Louis C.K., here is some hilarious stuff from them: