[Mightypeon]

Death has Banes (budget thug), Bane Lords (better than bane thug), Shade Mages (mind hunt protector/semi thug), Demilichs (dont underestimate immortal), Wraith Lords (really good in goon game mods), Tarts.

Water only has Sea Trolls and Queens in itself. Depending on the mod, it adds Great Krakens (very usefull in Goon mods), Wendigos (W/D) and Grendelkin (W/E). Both are valid SC choices.

Earth also has Cyclops, and, if you have GoR, Gargoyles and Crushers. Mechanical thugs are good raiders but easily countered in certain setups.

Fire has Zmey and Ember Lords. Zmeys are awesome, buy a crapton of them.

Nature is varied, it has sleepers (somewhere between a bane and a bane lord with some quirks), Faerie Queens (not really an SC, but can be very competent in anti raider roles, Gift of reasoned Tarrasques, Treants, and Tree Lords, as well as Ettins (with E).

Air has Shishis, Aesiers (Aesiers can often get Cloud Trapeze + Rain of Stones ability), the air queens and a bunch of ways to fry stuff that did not invest in lightning resistance.

S has everything with Wish. Ether Gate is a waste of S gems, dont cast it.
Golems however can be quite usefull.