Agreed , he was a brave man and a techincally brilliant driver.
I can't agree with you about Mansell though, he drove with guts and was brave with his overtakes (remember overtaking in F1?). He wasn't as good as Lauda, but he was never a boring driver like Prost. Even the Italian tifosi called him Il Leone because he had the balls of a lion. He did have shortcomings though - he was lacking in the technical knowledge that Lauda had, and so was not so useful to his team in giving feedback to develop the car - he was also very hard on the car, resulting in equipment failures.
Lauda was the complete driver, not only fast and driving the car sympathetically, but also knew how to develop it.
The film Rush gave the impression that Lauda and Hunt were bitter enemies - which gave an edge to the film to help sell it, but in fact they were apparently close friends.
George Best: "I spent a lot of money on booze, women and fast cars. The rest I just squandered."