Not even close for me.
Ferguson, Stein, Revie, Shankly, Clough, Wenger, Mourinho, Paisley, Ancelotti - all well above Pep in my eyes, and they're just managers that have managed in Britain in my lifetime.
Going further afield there's even more.
I'd put Klopp above Guardiola myself from the time he's been at City. He never had a stacked deck yet went toe to toe with PG and beat him a few times, lost by a single point or one win a few other times. Could have walked away with 3 CL trophies if not for the behemoth that is Madrid, City have only reached 2 finals under PG and even now Klopp's gone, PG will likely never match that at City.
He landed the Barca job during the perfect storm, he's clearly a good manager, but having Xavi/Iniesta/Messi/Busquests/Alves/Mascherano plus other elite players at their best is pretty much the most cheaty of cheat codes. Then people will say how he got them playing, he just got them playing the same way Cruyff did decades before. Rijkaard had them playing that way before Pep, might not have ended well for him but he won the league twice as well as a CL. He had Barcelona play Barcelona football that was pretty much Dutch total football from the great Ajax sides, yet you'd think he'd invented it.
He used that platform to land the Bayern job, again a squad stacked with World class players, and he took Thiago along with him to add another. They were treble winners when he arrived, he never matched that there - didn't even get close to it despite adding a few fairly good players, and by that I mean Lewandowski, Kimmich, Gotze, Vidal, Coman, Alonso - not a bad group of players to add to an already successful treble winning squad eh.
Then he went to City, who'd spent years building a squad suitable for his style. Spent a small fortune moulding it further to his liking, still took a loooong time to win the European Cup which was the Holy Grail. Even then they played a weak team in the final with an opposition goalkeeper that's seen as an absolute clown now.
He's a very good manager, having the best players doesn't always mean you'll have the best team, but there's no way he'd ever be able to turn Aberdeen into a European trophy winner, or reach European Cup finals with teams like Dortmund, Nottingham Forest or Porto, or turn Man United from also-rans into a 20 year trophy winning monster, or get promoted to Division 1, then win Division 1 the next season, then win the European Cup the following season (beating the dominant European team on the way) and then for good measure win it again the next season.
For me he's been very lucky and being at the right place at the right time has just snowballed. Now he's under the spotlight, his facade is slowly wasting away even after spending more than half of the whole PL January transfer total.
I don't think he's a fraud, I just think he's a good manager that's been very lucky in the personnel he's had at his disposal in every job he's had. He didn't build any of the great teams he had, he inherited them for the most part.
