A new favorite clown of mine that I only recently learned about is The Fool from Realm of the Elderlings. To quote a good lil post about him and his whole deal I found on tumblr:

"imagine having your own personal hater who's been assigned to you by fate and he is a tiny little clown who won't stop following you around and yammering about your imminent demise and worst of all you love him dearly"

Link: https://www.tumblr.com/2129888/789629455052292097/imagine-having-your-own-personal-hater-whos-been?source=share