Glad I could help point you in the right direction anon. Maybe try some crossfit gyms; in my limited experience of swiping on girls and striking out instantly, a lot of strongfat types seem drawn to crossfit and compound lifting, probably because there's not really any emphasis on being super ripped.
I know that we're all here for fantasy stuff, but I feel like there's a lot of real beauty in real-life muscular women as well. I love them in any shape and size, it's like it depends on the fucking day or something. Somedays I want a huge Natalia-level meat monster and other days I want one of those rail-thin Korean girls that are nothing but definition. There's a lot of incredible body variance.
Hope you find the strongfat of your dreams out there somewhere anon. Lord knows I'm still looking.