Can I ask how can you have must watch missing Akira? It's the benchmark.
It was recently shown on the big screen again at selected cinema's as it's been re-dubbed. Not bad for a movie made in 1988 and the only Anime I know of to be shown in a cinema in the UK.
Anyway for me, in order; Spirited Away, Akira, Ghost In The Shell, Patlabor and Princess Mononke.