It is natural to think that a singular verb should follow one of ..., but in reality the verb is always plural. Here’s how it works:
The underlined constituent in the quoted sentence is a noun phrase, with the structure one of X.
If I were to ask, ‘One of what?’, your answer would be: those artists who do not attempt something unless it can be done differently.
Now, it should be obvious that there’s a relative clause postmodifying artists, and since the relative pronoun who refers to artists, the verb that follows should be plural.