I use the Snark S1 or S5, small tuners that hide behind the headstock, and work perfectly. Compact, out of the way, and virtually invisible to anyone but the player. Bright display and easy to use, and cheap enough that I have one in every guitar case and one for my gig bag.
I haven’t had an acoustic with anything but soundhole pickup controls in a long time. I hate the idea of someone chopping a hole in the side of a fine acoustic guitar!