Accessible plugins

[blake tracy]

Hi everyone,
I apologize if this is slightly off-topic, and if it is, please let me know. However, I figured this would be the best place to ask since everyone here is a blind logic user.
Does anyone know of good accessible synth plugins, especially ones that I can upload samples to instead of, or as well as, using their own oscelaters?
I know of SurgeXT, and that's where I got the sound creation bug, but now I want to take field recordings, run them through a synth and mess them up beyond recognition to make my own sounds. I'd love to just upload samples into something like Surge, but it doesn't work that way, and I'd love to explore other options. I can't drop a lot of money on this, so either free, cheap, or rent-to-own recommendations would be apreciated.
Thanks:
Blake.