Your wrong, TC is the best hero because he is impossible to kill, that's the point. I would rather have stun/tc/grunts then the fs. Shockwave is pretty high damaging later on and there's no cap at dmg it can be. Stun isnt a attack skill, its a stun skill, with that mind, it owns any ground for a while. fs is good for harrassing and annoying, and giving that extra boost in meat for your army, but he can be nuked. mana is not an issue, because most heroes stick with 2 skills, and that would be either shockwave/end aura or stomp/end aura. also, you forget that the tc's dmg makes up for mana, low intel, high str.
and as far as first hero goes, tc is the best because he will be nuked as a 2nd hero. in a harrass, if you dont have defense and teched, thats your own dumbass fault. harrass is nothing to an orc, which is why it doesnt matter. you creep your tc up high, he will own. if your tc is level 5, then its over, unless they have level 7+ heroes.