Plenty of Williams fanatics in this world (yours truly included), so I think you should stick to your "Conti being number 1", which is slightly more unusual. Gives you that extra, unique edge, henry!
Ennio is in that hallowed place with the likes of John Barry, Maurice Jarre, Bernard Herrmann and Jerry Fielding. They never displaced Jay Dubya as my Top Guy, but I could hear that they existed in their own rarified space.