Answer:
Was
Explanation:
A linking verb is a type of verb that identifies a subject in a sentence and connects it to an adjective or noun.
Furthermore, unlike other types of verbs, they do not describe any direct action taken.
Therefore, the linking verb in "New Orleans cornetist Charles Bolden was a pioneer in the world of jazz music, according to many music historians." is WAS
I’m not sure what the question is. “Come” would be the correct present tense for the sentence, but if you need a different word with the same meaning to replace it with, then you can use “arrive” instead.
I hope this helped, if not, then you can reply specifying what the question is.