He was easily the best all rounder of his generation, ahead of his contemporaries such as Botham, Kapil, and Hadlee. Impact wise, the only all rounder you can put above him will be Sobers, the latter being a better batsman, but an inferior bowler to Imran.
Tendulkar's impact as a batsman certainly remains unmatched to this date, and it may never be matched in the next decades to come. However, as a pure batsman, Kohli trumps him in LOIs statistically, and his records across formats put him above Sachin.
Kohli's and Imran's captaincy credentials add more weight to their claims as the greatest Asian cricketers ever, hence putting them above Tendulkar.
From a statistical point of view, you will never be able to name a player averaging close to 38 with the bat, 22 with the ball in the purest format of the game. If you add the fact that he led Pakistan to series draws against the mighty WI sides of the 1980s, when other teams were struggling to even face them puts him on an even higher level as a complete cricketer. The WC victory just adds to his legacy, and if you keep in mind his legacy as a pure fast bowler, someone who inspired a whole generation of players to take up fast bowling, and a mentor to players like Wasim and Waqar, then his level as the GOAT Asian cricketer ever remains unmatched.
As I said, Kohli remains the only competitor to Imran as the greatest Asian cricketer ever, and he has a very good chance to go past him, as his stature as a pure batsman is already known by everyone, and his leadership qualities put him even closer to Imran as the best Asian cricketer ever. A WC trophy would certainly put him at the top.
The so called "Pro-Imran propaganda" is related to his political career, and doesn't have anything to do with Imran the cricketer, whose status can't be questioned.