Good Indie Troops

[Torgon]

Commanders-
Mages that provide magic diversity or sages
Scouts
Commanders to ferry troops around

Units-
Woodsmen Blowpipes - one of the best units in the game

Hoburg crossbowmen - one of the best ranged units in the game because they're so easy to mass. I do a little dance of joy if I find these guys and I have mages to cast wind guide.

Other archers if you don't have national archers

Amphibious troops to break into the water early

Perhaps knights or heavy cav if your nation doesn't have cavalry and you have some pressing need for a lance charge, but this is pretty niche and they're pricy so probably not.

Some of the amazon sacreds can be decent if you have a bless that fits them but they're also pretty expensive.

Thats all I can think of.