0ptical-, you're wrong. The strongest hero without any frills is the TC. The DH isn't really that great anyway, for its type. It's primary skill is Agility, but gains more Strength/level than Agility/level, which means overall it won't do much damage anyway. Add in Hero damage to the fray and it's not so good.
If you spent ages wondering why people think the DH isn't God, stick around here and you'll see.
KotGs can also start off quite well and for some strats it's sometimes a decent hero, sometimes better than the DH. And Miss PotM is also quite decent, though not the best. Not all NE players start off with DH, y'know. I can get quite far starting with all 3. Yes, I admit the DH is strong, but it only has one of the best Armors in the game (9 @ lv10), and deals unreliable huge range damage. Also, its health isn't great, which means the DH will quickly fall to Undead Triple Nuke, and then massive Immo won't help it. Remember, Meta lasts for about 1 minute, so you've got little time to use it.