Sinfest: http://sinfest.net/
Romantically Apocalyptic: http://romanticallyapocalyptic.com/
Drive: http://www.drivecomic.com/new.html
SSSS: http://www.sssscomic.com/comic.php?page=1
Questionable Content: http://questionablecontent.net/
XKCD "Time" : http://en.wikipedia.org/wiki/Time_(xkcd)
Patreon really is a miracle worker from this sort of niche content. I've seen fairly niche people put up a Patreon campaign, then actually freak out about how much money they end up getting, because you aggregate a couple thousand $1-5/month donations and Holy Shit. (Suddenly it's a Real Job (TM).) It's incredible feasible to go from "scraping by, annoying your parents and friends with what looks like a vow of poverty to do your Stupid Shit and living in constant money stress" to "comfortable middle-class lifestyle with reasonable income assurance". Not perfect, of course, but reasonable.
I mean, look at this: http://www.patreon.com/ZachWeinersmith
Any halfway-well-respected online comic artist not running a Patreon right now needs to get on it.
Keep in mind these people also still have their other sources of income: book runs, merchandise, etc.
I really think that in the long term Patreon is more important than Kickstarter for the arts. Kickstarter by its nature is much splashier and makes the big news articles, but it's Patreon that changes lives by chugging along month after month after month after month.
Can you imagine what Watterson could get directly from the public on Patreon? Most assuredly a better offer than any newspaper could ever offer him now.
Patreon is the next stage in the evolution. It is my belief that this platform will spur the second renaissance for creators who can at last focus entirely on their art without just one well-funded patreon (e.g., Harper Lee and To Kill A Mockingbird).