Thought it might be worth posting some more recent stuff, to remind us that comedic nudity is timeless. Here's the established comedian Sarah Alexander full frontal in the Armstrong & Miller show; I've not been able to source any better resolution footage, it looks like it was taken off a VHS. This was 1997. Any improvement would be very welcome.
My second thought was for the actress Pippa Haywood in an episode of the Tracy Ullman Show (UK). I don't have this clip but clearly remember it from the iplayer. There was a lot of controversy at the time as to whether, like Ullman, she was wearing topless prosthetics in 'parliament'. I'm firmly of the belief that it was all Pippa. If anyone has this, it's a bit of a Holy Grail for me.