Also wasnít Tulkas the greatest warrior? Or maybe he was just described as the strongest. I donít remember what the books says exactly. However, power and strength/ability as a warrior are very different things in Tolkeinís books. Which is why Tulkas was able to defeat Morgoth, a far more powerful Valar.
Tulkas was the greatest fist-fighter, he beat the shit out of Morgoth with his bare hands.
Eonwe was stated to be the best with weapons, so already that puts him wayyy up there above people like Feanor solely because of that statement alone, Feanor has way more feats and SHOULD theoretically win, but because of that statement alone in a fair fight you literally cannot bet on him to win since Eonwe was already outright stated to be "better" then him and also "better" then literally anyone in the Tolkien-verse that only uses weapons to fight.