Man, if you had said best, that would be more correct (Louie is awesome and great, but not always funny), but the five funniest shows on tv are:
The League
(incredible gap)
Parks and Rec
Archer
Community
Happy Endings
And if I had to name a next five, there wouldn't be any more NBC shows (maybe 30 Rock, but I think it would include Modern Family, Sunny, Suburgatory, Wilfred, and Tosh.0).