What mixed hero class (for combat) do you prefer?

No, I prefer either the Nature Warrior or the Fire Mage, but I lean more towards the Nature Warrior. I completely agree with Zdob. If they are well-developed, they can cast Dragon Strength, which is also great. The Fire Mage is good because of their Cat Reflexes, which allows for 3 ranged attacks – that's quite something. And they can also cast Confusion to make it easier for the army. Also, the Assassin is good; they have both buffs and debuffs, which is also good.

But I don't understand why the Nature Warrior is so good. What's the point of summoning wolves at level 20 (they only get a 20% effectiveness bonus from the spell)? With the Fire Mage, it's clear: they have their own dragons, and they won't accidentally burn them (especially Dragon Lords, they are tough and can defeat their own army). Armageddon is an effective spell, and so on. And all the others are good, except for the Nature Warrior, although I prefer the Paladin (I like playing with Life magic).
But it's just awkward when fighting undead. With any combat hero, the first tactic is to build a General (this is no secret). So, the question is: why do these walking corpses need a bonus to morale?