i find all of my cc on tumblr. although, i only use maxis match cc.
these are my favorite maxis match cc creators:
http://aharris00britney.tumblr.com/
https://rusty-sims.tumblr.com/
http://bustedpixels.tumblr.com/
https://ridgeport.tumblr.com//
https://simlaughlove.tumblr.com/
https://plumbobteasociety.tumblr.com/
http://wildlyminiaturesandwich.tumblr.com/
and here is a thread on here that also lists maxis match creators:
https://forums.thesims.com/en_US/discussion/815146/maxis-match-style-cc-list/p1
if you are looking for something specific you can ask here, op is quite nice and helpful:
https://forums.thesims.com/en_US/discussion/922141/im-back-with-a-new-wcif-investigory-thread-requests-now-open/p1
and here is this tumblr blog that compiles the majority of cc on tumblr, maxis match, alpha, and in between:
http://sssvitlans.tumblr.com/sims4cc
:)