I haven't heard of most of those, but if you want to avoid crunch, Heavy Gear is the wrong direction. I played a one shot a year or two ago and I was overwhelmed by all of the player stats/skills/attributes I had to keep track of.
Thanks for the tip. I think I bought it mostly for the archetypal resonance anyway, so to speak. :) In addition to playing these I'm looking at ways to deploy more mech-style thinking IRL.