Which Director?

To make my question more complex and interesting I have chosen to include an aspect about directors - this is something which I know fairly little about but as I hope to go and study Film next year at university I feel it's a good idea to put this in as part of my question and start learning about it now. Depending which film/s I chose depends which director I research but seeming as I have picked Titanic as my historical event I will focus my research onto directors of Titanic films.

My top 3 are:

James Cameron                                        Jerry Jameson                                     Roy Ward Baker

Although all these directors have vast film histories I have chosen to go with James Cameron as he is the most recent and has the information readily available about him. Also if I choose to just focus on the 1997 film about Titanic I will still be able to include the part about him and wont have to cut anything like I may have to do if I research the other two directors but don't end up analysing their films. Therefore I will focus on researching just James Cameron.