Ellen is legitimately an all-star standup. I would even rate her in my personal Top 10.
1) Norm Macdonald
2) Dave Chappelle
3) Richard Pryor
4) George Carlin
5) Steve Martin (as a standup)
6) Ellen DeGeneres
7) Louis CK
8) Chris Rock
9) Rodney Dangerfield
10) Jerry Seinfeld