For loose stuff you need big knobs, for durability you want it to be 60a or something like that.
A tyre such as Larsen TT would work well in the conditions you describe (commute & dirt path - hardpack) but probably not much chop in the loose stuff & mud (closely spaced & small knobs).
Panaracer Fire Xc seems to be an ok all round tire, having one of those (2.1) on the rear & a Michelin Hot S 2.2 on the front seems to be a nice fast rolling sort of combo, plenty of grip in the loose stuff and sheds mud as well.
My LBS said that High Roller front & Maxxis Advantage rear would make a good combo. The Advantage looks pretty similar to the Michelin Hot S in the tread pattern & I'm looking forward to getting a 2.4 to try out on the front.
I would go for something with largeish or at least well spaced knobs with a hard sort of compound for durability, you don't get as much grip as with taccy or softer rubber but durability is an advantage. Any of the ones mentioned so far would probably be pretty good. There has to be some give, so you will have to decide which you're willing to trade off the most - grip, durability, rolling resistance.
One which may be a good all round tire (but on the expensive side) is also the Syncros Point N Chute 2.1