Although spiritual, should followers of Buddhism and Taoism be considered as Atheists because they typically do not believe in a God?

Taoists have their ancestor spirits and immortals, Buddhists have their Bodhisattva’s and Bardo. Both speak to spiritualism, and both seem to directly conflict with hard materialism of Atheism.

But the fact remains, they don’t necessarily believe in a God of any kind. Does this notion alone qualify them as Atheist? In that light, is Atheism capable of embracing some forms of spiritualism as long as they don’t include an omnipotent deity?