It’s a good idea both to caution against arguing from authority, while also quoting good authorities. = )
Given your question, before offering an answer, I’m curious what percentage you think the breakdown might roughly be, even as speculation. Iow, are you suggesting a short list or a long list, as a percentage of all people, “who believe in EC or OEC”?
This could be compared for calculation with the “other” list in your opinion of current sociology on this topic, which presumably would be of “prominent Christians (living or deceased) who believe in YEC & biblical literalism”? It’s an issue of asking what your expectations are, before seeing your reaction to the results. It could be a long list & (“Can anyone…”) everyone here could add to it.
Book lists and people lists are always subjective and there is no winning or best list to choose from, though they can be informative as guides. The answer to your question depends on what “prominent” means also, and to whom. For example, are Roman Catholics allowed in the “prominent Christians” conversation? If not (your list is of 4 Protestants; adding G.K. Chesterton, whose “Everlasting Man” helped convert C.S. Lewis, as one example, or J.H. Newman, would change that), why not?