I only have a passing knowledge of Buddhism. I keep coming across people (buddhaghoSha, shAntideva, nAgArjuna, vasubandhu, asanga, etc.) who wrote authoritative works on Buddhism. And yet, I don't see it mentioned that they themselves attained Buddhahood.
Hence my question: who were some people who definitely attained Buddhahood after the historical Buddha, Gautama? Or would I be correct in my suspicion that no one did (but many came "very close"), and the next Buddha would be Maitreya?
Many thanks in advance!