Bark River Bravo 1, Bravo 2, STS-5, STS-8.
The Bravo 1 is like a choiless ESEE4, but 1/4" thick, and convexed. Fatter and longer handle than the ESEE4.
The STS series is worth looking at, 154cm, removable scales, semi-kydex sheaths.
TOPS has lots of tacticool designs, some thicker than others.
Winkler Knives II are very serious, look at the Hawks while you are there, impressive.
Have fun looking around.
That STS line from Bark River is NICE! Unfortunately, the price reflects this fact, along with the entire Bark River offerings. Definitely worth looking at, but priced a little out of my reach.
WOW! Those Winkler knives are beautiful (in a VERY rugged sort of way!) $350-500 is (unfortunately) unmanageable at this time.
Thanks for the list of exceptional knives to look at.