Enel fruit was op, he had decent endurance, he could move fast like thunder, and he even had some level of CoO.
Luffy only beat him because he was imune to all of Enel's strongest atacks, yet Enel with his god complex keept trying to atack him with thunder, even on his last atack.
People downplay Enel too much, i have no doubts he is strong enough to be YC3 at the very least if he is fightning someone who is not imune to his thunder atacks.