Is anyone else boggling a little at the question? With big rotors pretty much any half-decent brake with half-decent pads should provide more than enough stopping power, and LXs are decent brakes… Even for a massive rider you’ll tend to run out of tyre before you run out of brake, especially in the wet.
(feel/usability is a different thing but the OP is all about grip)
So I’m curious, how big are you? And what are you doing when you feel you need more power?
Hope OEM are the best pads IMO but not an option for you. Personally I’d go with Superstar Kevlar, your pads are probably the same design as I used to use in my Tektros and the SS ones worked very well.