I use slight knee bend. I try to think about “Pulling” with my heels, to keep pressure on my hamstrings.
If I lock my knees out, I find myself kind of almost standing on my toes, over extended, and using a ton of lower back. Almost pulled over the bar, in a position I would never want to be in deadlifting.
With a slight knee bend, it feels more natural to pull the bar towards myself, and to use hamstrings to extend at the hips, instead of using tons of lower back, and over extending.
Snatch grip sounds like it could be cool. 10’s or 25 plates instead of 45s can also give you a longer ROM. But could be a hassle if you’re StrongStrong.