I think Conan O'Brien can be hilarious. I remember watching him old school, like Triumph the Insult Comic Dog, are they still around? He always made me laugh with his self-deprecating humor, I loved when he had beautiful women on his show and made himself look ridiculous fawning over them. But I haven't watched him in probably 5-10 years. Different strokes for different folks.
I think this has some great guest moments: