Stapo in Veins Field 07 (ve_fild07), there are even bots there who punches Stapos for god knows how long in order to kill one.
Anolians in GH Culvert 4 (gl_sw04), not really alot of people here, but most, if not, all i see here have great gear based on their damage and how fast they hit those monsters. As soon as a third or fourth Anolian touches them, they teleport right away.
Raydrics in GH Chivalry 1 (gl_knt01)
Earth Petites in Geffen Field 06 (gef_fild06)
Boas in Payon Forest 02 (pay_fild02), not as much people here unlike in pay_fild08
Stalactic Golems and Thara Frogs in their respective maps in Comodo.
Most of them are already mentioned though!