>>390768654
This searches for all free 3D characters on booth, sorted by descending popularity:
https://booth.pm/en/browse/3D%20Characters?max_price=0&adult=include

If you instead sort by newest, you'll get plenty of models that aren't used much yet:
https://booth.pm/en/browse/3D%20Characters?adult=include&max_price=0&sort=new

There's a lot of models being made these days.