Work, so we're talking deep concealment, not quick draw.
Have you ruled out the tuckable design, called "Undershirt, by Dave Workman (D&D Gunleather) and produced with permission by Mitch Rosen as "The Workman?" If your shirts are not tightly tailored to you, this might be an answer that would allow you to remove your suit jacket when you wished.
I tend to wear straight cut work shirts, very seldom a suit (I'm in a skilled blue collar field). While I do not recommend it to anyone, and I caution that everyone's physical shape is different, I must admit to carrying a 1911 inside my shirt, behind my hipbone, butt forward, with NO holster, for many years now.
Dave makes a good holster, and he'd be the first to tell you the Mitch Rosen version is also very good.
“The police of a State should never be stronger or better armed than the citizenry. An armed citizenry, willing to fight is the foundation of civil freedom.” Heinlein