what are you not liking about the feedback specifically ?
I select a cab that sounds close to what I want and
I tend to use the absolute minimum noise gate i can get away with, just to keep hum down. I dont to use a gate at all in the stomps but I know alot do. and tweak the clarity definition & presence and to get where I want to be & tweak rest of the eq.
I add some compression in slot a, not in the amp settings to add abit of gain and sustain but I roll back the amp gain abit to compensate if I need too.
I like quite an open sound where the harmonics ring out well.
I do this with no other fx on, no reverb delay or anything else. im quite into the delay widened where appropriate, and add abit of reverb delay to taste. Boom.
I dont tend to tweak any further.
Just check your space settings in the output if its to wide or narrow to suit what your after.
Less seems to be more for me