You see the variance is huge. You might say the Pep Barca team was built around Messi and you wouldn’t be wrong, personally I think it was built around Xavi and Inesta.
I take your point on match winners and of course you need them, but a team for me is built around the sum of its parts, to use an overused analogy it’s like building a house, you start from the ground up, then develop the style, identity etc.
Personaly I don’t think teams are built around one player, nor do I believe you have to build a team around one player, especially in Gilmour case, you can develop an identity or philosphey and recruit to extenuate based on that. When you look say Swansea when they were in the PL they are prob a case in point, on paper they should be no where near winning a trophy but they did, playing a pocession based model, built around the likes of De Guzman and Leon Britton in the engine room. Then there is blend no way Leicester should win the PL on paper but did.
Many different ways of skinning a cat, many different ways of playing football.