The Alsasian one you can get at the Elven Kingdon at L8.
The huge gorrilla at L20 at the same place.
Best L30 is either a Gharinizon (basher) from the Duergar town, or a Soldier (dirter) from Avian town (harder to get to).
You can also purchase a scroll of STONE golen at L10 (or is it 5) in the Drow city. The idea is to recast it at L15 to get a L15 stone golem (max level is 15).
The Alsatian alows you to murder Snails, and the L15 Stone Golem will tank you most of emerald to mid twenties. A mage can hunt in emerald with a AC armor and both this pets.
Just cast faerie fire to decrease opponents AC, and then AFF spells.
Also buy the Halfling shop gear, as these is very good for low levels.