No I'm not in QRL pants, I'm in QLT pants (CCM Quick Lite). I'm same height as you but I weigh 195lb with a 34 pant size. Unless you got even thicker a$$ and legs than me, you probably are a size 36 or 38 pant, so this makes sense as to why HP45 medium are crazy tight for you. I'm surprised though the large CCM are as loose as they sound though. I expect the medium HP45's to me snug fitting but not choking my waist and legs.
I have to literally pull the strap on my large CCM retail pants as tight as it can possibly go, so I'm not too worried about mediums being crazy small. Sounds like suspenders plus the medium Warrior would be the best fit though for you. Sounds like I might even need to get smalls if I go with Warrior Franchise pro stock.