I used to use a GR-55, and got several sounds out of it that I really liked. One that I used for solos was particularly satisfying. I ended up moving away from guitar synths for various reasons (tracking not being the least of it), but have been chasing that one sound almost 10 years now. I’ve tried most pedals on the market, most recently the Eventide H9 Max. The sounds I’m getting from it are glitchy and spitty, which sucks.
Electro Harmonix has a bunch of POG-based pedals that are smooth and non-glitchy. Maybe the Synth 9 or one of the others would get you there. I haven’t used them personally, so just throwing out the idea without testimony.