If I have to tuck a shirt when carrying IWB, I use the Comp-Tac Minatour and one of the many different clips depending on what I where. I picked up different size belt clips when they were on clearance for 1.25" belts to 1.5". I have the velcro J clips and the C clips for my different belts w/wo velcro for almost any occasion.
When I tuck my shirt, I simply fluff it up on both sides so it looks balanced, I still look a little frumpy, but oh well. NO ONE HAS EVER asked me about it or said anything over the past 3.5 years of carry. No One notices or cares. I suppose if your a model it would be different, but I'm no model

, for me, It doesn't matter if I look a little frumpy as my shirts tend to loosen throughout the day moving around, getting out of the car or whatever. When I use a restroom, I will readjust and retuck if needed to be more "neat" in appearance.
So it really is about your comfort level of your appearance, no one else really cares.
Carry on