Here are some great sites:
http://mxims.tumblr.com/tagged/mycc
https://anbs.co/tagged/downloads
http://sims4luxury.blogspot.com/search/label/Object
http://mio-sims.blogspot.com/
http://blackmojitos.tumblr.com/tagged/dlbuildbuy
https://thesimscatalog.com/sims4/category/furniture/
http://novvvas.tumblr.com/tagged/novvvas
https://jomsimscreations.blogspot.com/search?q=downloads
http://sanoysims.tumblr.com/tou
https://viviansims4.tumblr.com/post/165334769548/fur-blanket-chair-10-swatches-download
Frau Engel does builds and includes all of the CC she used:
http://frauengel.blogspot.com/2016/04/ts4-industrial-living.html