I share your size. I never found an inside the waist band holster that worked totally for my , not slim size. I tried a lot of guns, semi-auto and revolvers. But it was always a pain in one position or another. I can't go with the "it's not supposed to be comfortable" train of thought.
The closest to comfortable was a Bianchi #3S, inside the waist band. You could slide it on your belt when you changed positions and it has a ratchet mechanism that allows you to tilt it, wile on your belt to a more comfortable position when you stand or sit down. Good features because fixed in one place on the belt is never comfortable in all the different positions you go thru during the day.
Still I had a lot of pants that were just not big enough for me, gun and holster all jammed in there.
Now, most usually when I go out the door it's with a Model 637 Airweight , 38 special, J frame in a pocket, and no holster.
If I do belt on the Bianchi holster, I carry a Taurus 455, 5 shot 45 acp , snub nosed revolver, those times I'm giving up waist comfort for the comfort of having heavy 45 caliber slugs . 45's can be realy comforting.
You just going to have to try a few methods to see what works for you.
Gary