If I were restricted to only those cartridges listed, I suppose I would take the .470, but my vote for the best big 5 cartridge is the 450/400. I agree with John Pondoro Taylor as referenced in the following article:

"...The slim case meant that double rifles in this calibre could be made light (under 10lbs) and handy...
...gentlemen/sportsmen chose the hugely successful (and very effective) .450 NE, whilst the professional hunter chose the 450/400. Even Karamojo Bell started his elephant hunting career with a Jeffery-built double in 450/400. John Pondoro Taylor is ecstatic in his praise of the 450/400 and rates it as “one of the grandest weapons imaginable for all big game hunting”. He also noted “I derived greater pleasure from using the .400 than any other calibre; and no weapon behaved more successfully in my hands. I would happily finish the remainder of my career with a pair of them and nothing else-unless it was a third!”
...The old 450/400 NE may produce a little too much recoil to fit my bill for a great ‘one gun battery/ all round rifle’, but for dangerous game, I’d pick one over a .458 Winchester any day!"