That's why I used the word 'legendary' for Batman. And by the way, he's called 'the dark knight'.
I also said rarely. Spidey got the legendary treatment a handful of times, Batman and Superman get it all the time.
You're just seeing what you want to see. Compare Batman's status in Justice League to Spider-Man's status in Avengers. Still think Spidey's more DC than Marvel? Then I can't help you.