The minis aren't cheap, but the design portion of the site is free to use, so I've been playing around in it quite a bit lately.
https://www.heroforge.com/
Here are a few examples:
This is a PC from my Borderlands II game:

My own PC from Saltmarsh:

And of course, I had to do one of myself:

Check it out. It's fairly easy to operate and you can do a lot with it.