Karkat goes to a convention is OFC a great comic, and one of the best. I have a few personal favorites (all on MSPFA:
>Space Entail (great comic with a lot of detail put into the background and background characters)
>Awakening Rift (there is a flash that should be coming out for this one soon, its got some really great art and characters
>A-Halcyon-E (For a mature audience only)
>Crossmound: REALLY similar to the HS style and writing and really interesting. and they update pretty often
> Welcome to Doomtils: a really fun comic that doesn't feel restricted by HS cannon in any way, lot s of creativity
>Seconds To Enter (Okay, I actually write this comic myself, so anything I say about it is biased)
>Sburb Done Quick: WOW actaully a comic that ended, obviously the joke is that its a comic about a Sburb speedrun, its really fun and a quick read