Let's start over......
I'm afraid you're going to run into that with most holsters, unless you're wearing a cover garment or very loose shirt. You will probably try many holsters before you find one that you are happy with.
That's what I read on WT the other day I may try a leather holster and see if its any thinner than a Nylon holster because to me it seemed like there was a lot of extra unneeded bulk to the Nylon holster.
That's why I had suggested the High Noon appendix carry IWB holster. It's a thinner leather one.