I'm not sure if JA approves, but the name I kept coming back to (after initial hesitation) was...
Now, bare with me here. There is actually a bit of resemblence between the two, plus Jared is a musician (with the band Thirty Seconds to Mars) and he can definitely act with the best of 'em. I made this little picture thing to compare and contrast.
Can you see where I'm coming from? And, plus, Jamie Foxx didn't look like Ray Charles! Joaquin Phoenix looked nothing like Johnny Cash. etc.
Plus! Consider this. Jeff Buckley was born in 1966, but died in 1997 that made him 31 years old (right? Maths was never my strongpoint). Jared Leto was born in 1971, which makes him 35. Very similar ages. Plus, Jared's a hottie (sorry, had to throw that one in).
So... yeah, that's my two cents. I haven't heard many Jeff Buckley songs, maybe I should?. Anyone else got any ideas for this movie? What song title should they use for the title of the film (they can't call it Jeff!)