It’s too bad that this -100000 aura moment is all that people remember of him
Yup, this basically answers your thread. Oda clowns them, which adds another dimension to them but it just doesn't help them reach that icon status.
Enel on paper, design, personality, is a very very well written and elite villain. Oda is great at character concepts, and in pockets Enel had insane aura, however we saw how that turned out...and tbf it does make sense (he was a big fish in a small pond, who ran into his natural counter, Enel was spoiled with a top tier logia on an island where nobody could even touch him), but it just doesn't help his staying power.