I use two sites for this stuff: OnlyFakes.app and dezgo.com.
OnlyFakes seems to have better models and a better sampler (though which sampler it uses isn't shown or user-selectable), but Dezgo doesn't impose a character limit on prompt sets. For both, I recommend setting the CFG to 9, and on Dezgo, you'll want to go with either the Euler (not Euler Ancestral) or DDIM sampler.