oh man, there are SO MANY.... many aren't even adverted as 'character' plugs but do just that.... all of the NEW EQ's from PSP Audioware are INCREDIBLE....the ClassicQ and NobleQ are my faves... the compressor is also very colorful in a super useable way.....oldTimer, and ESPECIALLY MixSaturator set to 'Tape 3'. Amazing.
Just look around and try different things.... anything by Softube, Brainworx, PSP Audioware, etc. has modeled circuitry throughout.... Softube's Trident A-Range emu comes to mind.... the 'color' or in this case, distortion if you will is variable, almost like a threshold knob... it sounds shite on pretty much everything but RULES DICKKKKKK on guitars and SOMETIMES bass... tends to eat up too much low-end for bass but that's what makes it so PERFECT for GTR's..