I’ll join the “two Glocks” chorus, though I am more of a G17 guy, for my own use, and when asked for recommendations. My preferred Generation for an unaltered G17 is Gen4, as everything just fits, and works, as-is. A Gen3 is a less-than-ideal fit, but works well in my hands, with frame mods. It may be sample variation, but my two Glocks with truly bad clunkety-clunk triggers are Gen5.
As for concealed carry, anywhere I can truly conceal a G17, I can conceal a G19. The challenge is the protruding, blocky, rear of the slide, not the grip frame height.