LJ-Phillips does one of the best serious webcomics Smoke, Fur And Stone. Dark fantasy meets bara. Gay burly werewolves? A crime story with a ghost mob? Need I say more?
KannelArt does a very different kinda webcomic, probably the best TG webcomic. Raan's Doll is bright, fun and so sweet it'll make you go squee
kaokatt doesn't do a webcomic but is the artist behind so amazing hard-core TG comics like the infamous AMSTERDAMNED NITES. If you dig hard-core, very dark forced TG stories, this is a superb series. It's available on Lustomic.com.
safewordignored does a very cool pay comic called Kate's Cucky Maid. It's the first TG webcomic I've read that explores both forced crossdressing and cuckholding. Free previews on DA but more available on their Patreon.