[Verjigorm]

Most nations with recruitable thugs have better units than Pathos, but his Awe gives him a tiny edge primarily against independents.

Until you get some way to restore his HP (regeneration/life drain), it would be best to keep him back. He's a great leader. Stick a bow on him or make him your prophet until you get something that makes him melee-friendly.

After melee-friendliness, the best complement to his ability is obviously the Shield of Gleaming Gold.

If it's EA Arco, an Oriead is a better thug after some research completes.

He can't take provinces by himself reliably even with gear because he only has 16 hp and not-great defense, but he's a free leader and better than an indie commander.