When you jelq , take two fingers and jelq from base to the head perpendicular to the floor, squeezing your penis together, opposite the way it is wide, thats what I try to do, my dick is also very wide as well.
I think wideness is desirable, but I would prefer thickness (from top to bottom direction). Mine is wide but somewhat flat so my girth is a lot less than 3xwidth. I may be wrong, but I would think having more thickness would hit the female anatomy in a better way.
Whenever I see a really thick cock, it almost looks like 2 dicks stacked on top each other. ( Ok, my anatomy here is sketchy, so help me out.) I know the penis basically has 3 chambers, 2 side by side and the one underneath. Corpus-something, I guess. I always notice very girthy ones seem to have that bottom chamber very prominently sticking out. I, on the otherhand, almost dont have one. At full erection, it doesnt really stick out and the bottom doesnt get really hard. Thought the top and sides do.
General jelqing will help even out your penis across the board. Putting allot of priority of length exercise is another way to attack this. A wide penis is something that is very difficult to attain so you have one thing going for you already.