Yaarel
🇮🇱 🇺🇦 He-Mage
Establishing frequency is a good idea.Here's the list from the world generator for my homebrew world, ordered roughly by prevalence:
View attachment 402126
It doesn't cover Tieflings, as they don't have a significant local territory, and it is certainly not exhaustive beyond that. Any of those would be fair game for a player to roll up a character as, but not the limit.
My medievalesque setting has Giants be the most frequent creature type, but they typically inhabit the Ethereal Plane. Then among Humanoids: Humans are most frequent, then Gnomes, Dwarves, then Elves. Typically, Gnomes inhabit the Fey Plane in and around a Material Human settlement. Dwarves reside underground in the Ethereal Plane, and Elves in Fey fertile forests or Wildspace skies. Dragons originate from Giants but are a distinct Creature Type inhabiting the Material Plane. It is normal for members of various species to immigrate into each others communities. Hence the larger communities tend to be multispecies, but usually remember which species founded the community.