Maybe a variant Druid that strips out Wild Shape for Totem abilities like the Wolf Totem power of the Barbarian (that I've never seen taken over Bear, but seems pretty good).Maybe shaman? But that could probably be a sub-class of druid. I dunno - I'd rather have fewer classes than more, TBH. Most of the suggestions seem like they could work just fine as sub-classes.
I feel this works in theory, but in practice 5e subclasses are such a tiny part of the power budget that they completely fail to scratch the same itch as when they were a full class.I find the number of classes to be very dependent on edition. 5E has a hard time justifying a new class, usually only to fit into a specific setting. Older editions tended to use new classes as a way to add new character concepts, which 5E just uses sub-classes for. The only one I feel that could be added (if they ever decided on how to work it mechanically) would be the Psion.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.