6'4 here too.
I used to be 187, a walking skeleton.
I find deads are easier on me than squats and even bench. It depends on what your leg vs. torso length is. Me, I have longish legs (34+" inseam and a semi long torso, my dad who is 6'3" has shorter legs and a long torso.)
I still do front/back squats and bench, but I don't think I will hit 'strong' numbers on them due to the fact that its a helluva lot of travel compared to guys with shorter arms/legs. I switch between PL and BB stances on squats, depending on what I want to hit (quads/glutes), but other than that, I just keep working on them.
I think the worst part is adding any significant 'size' to your arms/legs requires A LOT more muscle to be wrapped around those long bones than someone that is a little more compact.
Sorry, I've got no tips, just commiserating.
I would not trade being tall for anything though!