Most enlarger lenses are either 4-element Tessar types, or 6-element Plasmats. There are a few rare 4-element dialytes too, but not many. The most "exotic" one is probably the Voigtländer WZ (2 elements soft-focus enlarger lens), but that is old.
Some condensers are aspheric - mostly high-end 35mm enlargers. The rest are one- or two-element spherical.
It's an interesting thought, that you have to get very new or very old to get something unusual. I think it might be correct, too. The largest variation in design and quality seems to have been the "Anastigmat explosion" in the beginning of the 20th century, when every lens maker had at least one "unique" flavor of anastigmat!