First, the anduril FW on lexel’s drivers have the option of stepped modes instead of ramping. It is full of features and might be the easiest way to get the voltage indicating switch lights that you’re interested in.
If you want to go off the shelf, I would recommend either a FET driver or a 8x7135 driver. With the XML2 there is not going to be a huge difference in max output between the two driver types, so it depends on how much you value regulated brightness. Mtnelectronics has good FW options, but unfortunately they are out of the larger diameter 7135 drivers. You could get a 17mm qlite driver (with momentary switch) and use an adaptor ring from convoy. I did this in a mod linked below.
Or you could get a 22mm FET+1 driver from Mtnelectronics and file the edges down a bit to fit. You’d prob want the thinner pcb thickness.