Another thing you might try if you haven't is different types of bar tape. I was amazed how comfortable cloth tape is, for example. I have a couple of bikes with relatively thick and cushy Bontrager gel tape and while they are comfortable, I recently put "old fashioned" black cloth bar tape on an old Schwinn and absolutely loved the feel. I have lightly padded gloves and when I ride real cushy bars I usually leave them off. On the cloth-wrapped bars, the light gloves are perfect. If you haven't given it a go, try it to see if you like it.