“most Christian” makes as much sense as “a little pregnant”.
You are either a Christian or you are not, you are either pregnant or you are not.
nit picking over these things is silly and a waste of time. “Most Christian”.... substitute “has the correct doctrines of Christianity” (which would be the most) if that makes you feel better. I doubt you don’t follow what I am meaning. You’d rather play silly nit pick games?