So far I've found two blatant rip-offs reverent homages to Withnail and I characters.
First, there's Willoughby Kipling in Doom Patrol, who looks exactly like Withnail and quotes him word for word. I've seen him described as a Constantine clone, but clearly by people who haven't seen Withnail and I.
Secondly there's Papa Yeltsin in Nikolai Dante, who is quite clearly Uncle Monty. Identical in appearance, a drinker and a 'toilet-trader'. Monty says 'are you a sponge or a rock', while Papa is a little less subtle - 'It isn't bullets I want to pump into your body'. Nice.
