Anytime they upload anything, I download it without even looking that's how insanely talented they are. The variety, the themes, the maxis-matchiness of it all, the quality, the functionality, the originality. No one on the entire Sims 4 modding community comes close to them. Jius Sims (Tumblr) is THE SHOE CC CREATOR. Some of the hairs might lean slightly into the mixed maxis-alpha, but they're still fully compatible with Sims 4 graphics.
Their most popular are celebrity-inspired hairs, but you can find great quality and unique hairs there. Simcelebrity00 or SC00 (Tumblr) makes great maxis-match hairs. They're very consistent in their content. They also have item-index on all their packs, along with pictures so you can pick and choose what exactly you want to download instead of downloading the entire file. From CAS packs, to hairs, clothing, accessories, base-game overrides.
Aharris00Britney (Tumblr) is one of my all-time maxis-match faves.