Said it before and will say it again ... The De Havilland Comet 4 should be in there as it was the world's first jet airliner. First flight in 1949. I was transported to Australia in one of those (parents emigrated from the UK), a BOAC Comet 4C in 1965. We should remember and celebrate our history.
I think there are still more important planes: A350, A340, A330, A220