From everything I've seen, heard, & done myself? I'd suggest either a Commander 1911, a Glock 19, an M&P, Ruger SR something, or a Springfield XD something... I have experience with each of these & have seen them in the hands of several others. Simply put? These work.
When working with newer shooters on determining their natural point of aim, I use three different blue guns (considering adding a fourth) and we typically can find something that works for them. I use the G19, the 1911 4" Commander, and the 4.25" M&P. Once we determine what points better, we can move forward with discussion of caliber & how to CC with what fits them better.
Pretty much my list as well. I keep a G19 and M&P around for people to shoot.