"The 100 Greatest Stools in Stand-up Special History." There are photos — in one case a video — with explanations, e.g.:
The one example is the last-place Joe Rogan. You can go directly to the NSFW video at YouTube, here. That is declared the least-funny thing not just among stools, but in comedy generally.
What ended up at the top?
There's Marc Maron at #4:
Marc Maron explores the fusion of man and stool. Both lead to equally mind-bending results. Maron treats his stool like a performance-enhancing body-mod; when he sits on it, slouched and confessional toward his audience, knees pulled up to his chest like a wise cartoon toad, his neuroses and humor fold in on themselves. The stool closes up his posture and opens him up to the audience. Maron is a philosopher king, and the stool is his throne.
And Paula Poundstone at #3:
Look at Poundstone’s form, straddling this stool! With one foot over the seat and the other sprawled back, she’s a sprinter in suspended motion. Poundstone rides this thing like a Valkyrie, constantly shifting into new and strange configurations. Stand-up comedy is a fine dance, and the stool is her partner in the tango.
That happened in 1989, and I saw it back then and always remembered it. She worked that stool. They only have a still photo at the link, but this one deserves video, so I found it for you: