Honestly, using appraisals about him to support your claims isn't the most convincing of arguments because they were just speaking generally, I believe they would have good things to say about Modric if asked because Modric is hugely talented as well.
I don't deny that he's our best midfielder but saying that he's consistently a top 3 player for us in every season he's played in is a little ridiculous and doing the players who have performed better a major discredit. Beckham, Keane, Stam, Yorke were all definitely better and more influential than him our treble winning season. Between 07-09 when we had our most successful run in Europe ever, Rio, Ronaldo, Carrick, Vidic and Evra were all by far the standout performers. Even Carrick and Fletcher outshone him in the same period. The only period when he really stake his claim as one of our most influential player and a "dangerman" was probably from the turn of the century to the mid 00s. The same period when we were going a decline and transition, which was a bit of a shame for him. He came back from his career threatening eye-injury in 2006 and was probably the best midfielder in the world that season. After 07/08 he already had one foot in retirement and used sparingly by Fergie. The 06/07 season was the last time he would hit 40+ appearances for us. I believe if we answered our midfield issues then, Scholes would have retired earlier. The fact that he went on for another 4-5 years was a testament to how bad our midfield woes were.