They're orcs from Caesar Miniatures, who in addition to their historic stuff have a range of 1/72 scale fantasy minis. The ones in armor got some headswaps with some knight figures, also from Caesar, and there were a few other modifications. I'm calling them "hobgoblins," because ochre-skinned orcs are about as close to DnD hobgoblins as I'm going to get in this scale. Read more about them at the blog!
I haven't actually bought any Safari Ltd. Toobs for gaming lately, but I've thought about it a lot. The Mythic Realms set gets mentioned a lot, as do the Lair of the Dragons toobs—the dragons are kind of small, though, even for 1/72. The Prehistoric Life and various dinosaur toobs are good for Lost World gaming, and for other monsters. Some newer sets like the Cave Dwellers or Cambrian Life might be good for gribbly Lovecraftian monsters. And lots of sets have insects, though you can find bags of toy bugs for a lot cheaper, especially around Halloween.
If you don't mind the 2" scale for human figures, you might like their fantasy/medieval sets and other sets like them. Papo, a similar company, also has toob-like sets of fantasy figures. Companies like Timmee, Spherewerx, and Toys r Us' "True Legends/Heroes" line produce cheap sets of unpainted plastic figures in a similar scale.
You mention some of the toobs I have.
I would reecomend the mythical realm to everyone, wether you play 1/72 or 28mm. The Minataur you get is slightly bigger then your average 28mm so he can be a runt in 28 or a bruiser in 1/72., the chimera, Phoenix and griffin are slightly small for 28 in my opinion but still useable and Chimera are hard to find.. The Dragon can be used as a baby in both scale. The Unicorn is good for 25mm but would be a Clydsdale in 1/72. Neptune and the mermaid can be used as giants in either scale.Or you can use Neptune as Neptune himself and put the fear of a God into your players.
AS forThe ancient sea life figures, I plan on using some of them as dungeon clean up crew figures. What to do with a giant tribolite and a giant ancient pillbug Im not sure as I have a hard time thinking of a tribolite, even a giant one as a threat.And a giant sponge is even less of a threat, but might use it as an object for a quest. I have a few other toobs so perhaps I can stop by and describe them.