Although privileged with some great players, let's not forget the impact he had on those careers. The likes of Messi, I'm not sure before 2008/09 many would have said moving Messi central with Eto'o and Henry either side of him and playing really without a proper CF would be the way to play considering at the time, the other two are strikers and Messi then was seen as a winger but he did.
Yes he's had the tools (I wouldn't say the team) aswell he's also spotted potentials 'tools' which others may have overlooked or quickly let go, He bought through Busquets and used him perfectly to allow him to become one of the finest holding players currently in the game. Pique one of the best CB's. He has developed players to become the best in their position and although the way of playing is ingrained into the club, I don't believe you can win so much and create one of the best teams to play the game without being a brilliant coach. I'm sure he worked as hard as anyone at making sure Barcelona were the finest team.
Season before Guardiola team Barcelona finished 3rd with 67 points. A season later, they win the league with 87 points and collect the Champions League, I think it's harsh to just say he inherited a great team, he didn't. He made a lot of very good individuals into great one's and more importantly into the best team possible.
I think to be one of the greatest ever you have to continuous success with different teams or in different era's but I do think he is a great coach and has proven that because although maybe Guardiola may not achieve what say Mourinho has and won titles across Europe, you could argue that Mourinho couldn't have achieved what Guardiola has. I won't say Guardiola will be as successful at his next club compared to Barcelona, that'd be impossible but I don't have many doubts that he'll be successful for the large majority of his career.
A great man and a great manager. Pep to Villa.