How about hitting the gold reserve or a government (citizen's) datacenter so you can sell data on the black market. Since banks are becoming overrated targets?
You would probably need an army of helpers though for the reserve, but it comes close to a movie-like heist
Hacking the datacenter should be the easiest one with someone highly placed on the inside.. Read an article that said a person's data is worth a few bucks on the black market.. steal millions get multiple millions tu gusta?