Whether you like the wines he was responsible for or his methods of promoting them doesn't matter. Without him, the American wine industry wouldn't be what it is today... and I mean that in a good way. He was a great popularizer of wine and a champion for California and the United States.
Those in the wine industry who try to appeal to the masses but still make high-end wines too can and probably should look to Mr. Mondavi for inspiration and as a model.
Cheers, Mr. Mondavi. Rest in peace. You will be missed.