Okay, of course I didn't take those images from Nature, Time or Science magazine ... but the internet is full of similar graphics where Sylvanas is much stronger than Arthas and Illidan (who have had playable class in the game for years. .)
Also, in 2019 and 2020 Sylvanas was the most searched word from World of Warcraft on google.
Posting this just so that posts like yours invalidate posts ... like mine.
p.s: Ah, in the future avoid taking a single sentence from someone's text to make the entire text unfeasible. The name of this is "scarecrow fallacy" ... and it is quite dishonest.