I know of ayanamifan, pokkuti and lorddaroth on patreon thats worth supporting when it comes to art: patreon.com/ayanamifan; patreon.com/pokkuti; patreon.com/lorddaroth
Also, fp909 and magnusmagneto if you like stories: patreon.com/fp909; patreon.com/magnusmagneto
Oh and I recently found out about siberianar's patreon. He makes awesome 3d musclegirls: patreon.com/siberianar
These are the ones that come to mind at the moment. Redsilverartist is on patreon too, but not active. Should he start posting one day, I'll link it too. Because his is definitely worth supporting