sorry
I'm sorry erniebert1234ss, Harvey actually did 5 issues of Muppet Babies in the early 1990s. I just noticed that there are more covers on MileHighComics's site. Anyway, there you go.
Incidentally, there are other Muppet comics that could be counted. There once was a newspaper Muppets comic strip that ran in the early 1980s. It was done by a dude named Gilchrist and you can find some of his work online.
Also, Muppet comics have been featured in some of the 1980s British Muppet Show annuals, I think.