Thought that.
You definitely can make that argument. He was very influential for Holland in the 70s, when he and Michels implemented total football. Then he brought the philosophy to Barca, and revolutionised the club and influenced all of its modern legends such as Guardiola, Laudrup, Xavi, Iniesta, Messi. He began a tradition and style of play which remains to this day.
And on top of that, modern teams are influenced by Guardiola's Barca team of 2008-2012.
Then you go back to the guys who influenced Michels. Sebes as one example.
It's fair to say that Cruyff and Michels are two of the most important figures in influencing the modern game, and their legacy lives on to this day and pervades every aspect of how football is played.