Answer: theorist

AnswerCrossword Clue
THEORISTThinker
THEORISTCreative thinker
THEORISTDeep thinker
THEORISTNewton or Einstein.
THEORISTThinking person
THEORISTImpractical person?
THEORISTIdea man, maybe
theoristperson who deals mainly with the theory of a subject
theoristperson who theorizes
theoristone who theorises (to form theories, also THEORIZE)