>>122278
Pixiv as previously mentioned, Pixiv Fanbox because almost all the actually good artists have paywalls now, and for the most part they're pretty reasonable at like 500 yen per month for the basic tier.

exhentai/hitomi.la has some good archival galleries.

Darkspot Two has a handful of good CG artists, but the site runs terribly and its basically a retirement home in terms of age demographics.

Some artists also upload their work to twitter, but those accounts are often banned.