yes we agree (most of us anyway) that it's near impossible if not completely so, i'd like to hear Keith Caputo sing Tonight's Music though... would be interesting
Mark Kozelek is more acceptable along this line, his voice is really dreamy, bewitching, sometimes dark, for all that he's missing this unique discouraged overtone Jonas has.
The new one is shit...lol. But His voice can be quite good and, though no one can replace Jonas, he wouldn't be TOO bad...listen to the song "Adorer and Somebody".