Context - as always.
Ramos' qualities are ideal for a top team, a team competing for the biggest prizes: his leadership traits and his uncanny knack for stepping up in big games, scoring crucial goals - and so forth - makes him a great player, no question about it.
However, the idea that he would shine for a Pulis team (as suggested above, unless I misread that) seems utterly unfounded. He isn't a great defender, period. He's far too rash, his positioning is questionable - and...everything others have listed here time and again.
None of that means he's a shite defender (he obviously isn't - but he clearly doesn't compare favourably to actual GOAT level defenders in terms of, well, defensive qualities). Just like Koeman, for instance, who was mentioned above. Koeman isn't considered a historically great player because he was on Baresi's level as a defender. He obviously wasn't - but he had other qualities, which elevated the teams he played in significantly, teams that won the biggest prizes (and/but were loaded with top level players in other positions). And that's Ramos, essentially.
Baresi in a Pulis team would still be just about the best defender you could hope for (in terms of positioning, anticipation, reading of the game AND leadership) in addition to being a more than useful ball player/passer, etc.
Ramos in a Pulis team? He'd be great in the dressing room and very dangerous on corners, no doubt.