These are from the glossary in Georg Luck, Arcana Mundi: Magic and the Occult in the Greek and Roman Worlds 2e (2006). Note that goes and hariolus have negative connotations:
Greek
goes 'wizard, sorcerer, juggler, charlatan'... The word can designate the "wizard" (a low-class type of magos) or any quack, humbug, or impostor... Originally, goetes (from goao 'to wail') could have been an early Greek shaman whose specialty was a ritual lament over the dead (screams uttered in ecstasy), but it could refer to shrill cries uttered in a normal state of consciousness, during a magical ritual.
iatromantis 'physician-seer', also 'miracle-worker' (semimythical figures like Abaris, Aristeas, Epimenides, Hermotimus). Another form of shamanism in Greek culture (diagnosis, prescription, and prognosis made in trance).
psychagogos 'expert in raising spirits' (to consult them about the future or use them as harmful agents).
sibylla 'ecstatic female seer of a certain type' (localized, attached to sanctuary, but prophesying without answering formal questions).
theios aner 'divine man, holy man', i.e., miracle-worker, prophet, healer, shaman.
Latin
gnarus 'one who knows'. Probably vague on purpose, like other terms of this kind.
hariolus '[ecstatic] seer, prophet, diviner', but usually in a pejorative sense.
peritus 'expert' (in magic).
Sibylla 'type of female diviner, ecstatic prophetess', sometimes worshiped as deity.