Well keep in mind the more machete-like you get, the less return on your investment of a "hard use" knife. Not that you are likely to bust or rattle loose a thinner khuk, its just that they work OK as a heavy machete...but really, a $15 machete clears lighter stuff much more efficiently (of course I use a 20" Kobra instead, but I'm a khuk knut

).
Pretty much any HI knife is going to survive a rock ding inasmuch as it will suffer the expected flattening/chip at the impact point. I guess it depends on what you really want to use this for. Machete work or martial work.
A chiruwa Tarwar would be a beast of a chopper. A bit heavy, but the weight is spread out over the length a little better than a giant AK. You could limb trees AND goblins with that.
If you are looking more along the lines of a fighter, a 20" Cherokee Rose bowie is really tough to beat. I don't think I have ever handled a large fighting knife that whips through the air with such grace. I love mine, and they often come up in villager finishes. Keep in mind that it's a thinner stock with an ergo handle that is for comfort, balance, and maneuvering...not chopping down trees. It's a fighter that I have used to split kindling and light camp work (light being a relative term for an HI knife. It's still tougher than 95% of the "hard use" knives sold out there). It's mainly used for bump-in-the-night duty.
If I were going to split the difference between a fighter and something I could pry with (within reason, of course), I would look at the Tirtha bowie. Mine is right at a smidge over 17", 10" blade so plenty of handle. 1/4" thick with a chiruwa handle. Razor sharp, stout, very balance in the hand yet puts a good bit of stank on the target when you chop.
Mine was ordered with a villager finish because I prefer it to a mirror polish.
Here's a pic of the aftermath where I was attacked by a tomato with malicious intent...self defense, I swear

...oh and I have to edit to add that half of those cuts were made with the CLIP of the blade
In short, what's the total length you're looking for? Pretty much anything is going to be livelier than the chiruwa AK.