hmmm, well the 5e PHB had 9, but if we're removing individual subspecies i think we want more species to compensate that each one will individually be providing less customisation options, i'm saying 10-12.
my shortlist would be:
human
dwarf
elf
halfling
orc
dragonborn
tiefling
aasimar
warforged
goblin-hobgoblin
goliath
shifter

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