6. Francis Ford Coppola
Francis Ford Coppola would earn a place on this list for Apocalypse Now alone. In a manner similar to Cimino's herculean Heaven's Gate undertaking, Coppola went ever so slightly mad while shooting the Vietnam War epic, going around $15 mil over budget, driving his alcohol-infused star Martin Sheen (who was flown in after Coppola gave the boot to original lead player Harvey Keitel after only a week) to an early heart attack, all the while taking over a year to finish principal photography, as opposed to the five months originally proposed. But Coppola has filled his career with all kinds of difficult, and has always been one for battling anyone at odds with his 'vision' (he made a close enemy in producer Robert Evans on the set of The Godfather - he eventually went on to sue Evans, at the same time as working with him on The Cotton Club), his own mountainous self-belief leading him to believe there's only ever one right opinion: his own.