Jesus H. Fucking Christ, the guy left out Dvorák's New World finale... SERIOUSLY??
http://www.youtube.com/watch?v=BFZcCNYF6-4
That's, like, fucking Force Theme for you right there...
Then, I'm sure at some point Williams must've heard the overture to Wagner's Tristan and Isolde, because, well, compare:
http://www.youtube.com/watch?v=d3IIeNorhVU 3:36
http://www.youtube.com/watch?v=fktwPGCR7Yw 7:15
Not to say that chord combination is totally unique, or was invented there... but come on, tell me that ain't a clear shout-out :D
Then, call me crazy, but somehow the Han&Leia theme terribly reminds me of Liszt's Mephisto Waltz no.1... distantly, though.
No single famous composer from the Romantic era? Really?
Just throwing it out there...