Rarely it seems, if ever, is Luis Enrique mentioned in the same context, as if he somehow doesn't deserve a place at that top table.
The 55-year-old Spaniard will shortly lead his Paris Saint-Germain side out at the Munich Football Arena for a Champions League final date against Internazionale, and if the French giants triumph in European football's premier competition, his legend in Paris will be assured.
Despite having some of the game's best players amongst their ranks at various times - Ronaldinho, David Beckham, Zlatan Ibrahimovic, Lionel Messi, Neymar and Kylian Mbappe to name a few - PSG have always fallen short when it mattered.
This season it's been different.
Yes, there are still a smattering of star names in the squad, but as he showed when once disciplining the likes of Messi and Luis Suarez whilst at Barcelona, no matter the name, Luis Enrique won't suffer fools gladly, and that strong hand is evidently working its magic again.
Guardiola's Barcelona are often seen as the greatest club side in history
It was Pep's all-conquering Barca side that many see as the benchmark. Potentially the greatest football team in history.
That is some claim when you think of the Real Madrid sides of the 1950s and 60s, Liverpool in the 70s, AC Milan in the 80s and Manchester United in the 90s, not to mention other teams who have changed the landscape in some way, shape or form.
A sextuple in his first season in senior management paved the way for consistent success across Guardiola's career to date and indeed, in just 17 seasons, he's amassed an astonishing 39 trophies (not including individual awards), 14 of which came at Barcelona.
It's quite ridiculous to think that he was Barca coach for 118 home fixtures, winning an astonishing 97 of them, drawing 14 and losing just seven, which equates to a massive 82% success rate.
However, it's often been said that with the likes of Messi, Andres Iniesta, Xavi and others all reaching their peak at the same time, all that the team needed was a little tweaking here and there.
That's an accusation that was levelled at Guardiola during his time at Bayern Munich and Manchester City too. Essentially, all three teams were ready-made for success.
Luis Enrique surpassed some of Pep's Barca records
Luis Enrique, on the other hand, took on a Barcelona side that were evidently in transition and yet in his first season usurped some of Pep's records.
11 wins in a row was the equal of his contemporary, whilst his 42nd win (against PSG) after his first 50 games in charge remains the best record of any Barcelona manager.
His football may not have been as pleasing on the eye or as technical as Guardiola's, but it got results.
In fact, his win percentage of 76.2% from his stint at Camp Nou tops Pep again, the Catalan managing a slightly worse 72.47% over his four seasons at the helm.
Nine trophies, including the club's second treble in his debut season in the hot seat, the era-defining 6-1 comeback against PSG and the last-minute Clasico win at Real Madrid are just a few of many highlights.
A great season so far with PSG... and it could get better
This season, Luis Enrique has a more than acceptable 72.7% win percentage, his third best in the past 10 years of management, and has won 40 of his 55 games.
Seven losses in all competitions is just one more than his treble-winning campaign with Barca, whilst 21 away wins has only been bettered by that 2014/15 season.
Ousmane Dembele, a former employee of Barcelona himself, has really come into his own this season, but it's the emergence of players such as Desire Doue and Bradley Barcola in a free-flowing attacking XI that has made everyone finally sit up and take notice of the Ligue 1 champions.
Perhaps what's of more value than just the numbers is the way the manager has transformed PSG into a well-oiled machine, both domestically and in Europe.
Annus horribilis for Guardiola and Man City
From Guardiola's perspective in the same time frame, he enjoyed unprecedented success at both Bayern Munich and Man City, earning the latter their first-ever Champions League title (and his first since 2011) and winning another treble.
This season has been the most disappointing, however, and a 51.9% win percentage is his worst in the past decade. Yet City have still scored a jaw-dropping 109 goals (still the worst return from a Guardiola team in 10 years).
28 wins and 15 losses can be added to the 'worst ever' column too, in what has been an annus horribilis for the 54-year-old.
In a season where Guardiola has again seemingly had everything at his fingertips for success, things have fallen flat, whilst Luis Enrique has already overseen a league campaign for PSG that's up there with the very best and could finally land them the greatest club prize.
Isn't it about time for the latter to be spoken about in the same reverential tones as the former?
