Is there a specific word for a genius who can express themselves via original insights?
I want to say that
there are no ____ in the arts anymore, it's impossible
An idiom would be fine.
Perhaps there is some synonym of 'self expression'
the expression of one's feelings, thoughts, or ideas, especially in writing, art, music, or dance
which forms an idiom with 'genius'?
The closest I myself can think of is some variant of heurēka, "I have found it".
'Creative genius' almost works, but I don't think that it excludes genius that is not self expression. None of the other synonyms, that I know, exclude everything but creative genius.