Jack was the one who started this in the first place, and has done most of the songwriting and audio production so far. In other words, he's the one to blame for our shortcomings.
James is Band of None's spiritual advisor and resident stand-up comedian. Not to mention his accomplishments on the electric triangle, which will someday be legendary in any number of parallel universes.
Jonny is our newest member. So new, in fact, that he barely knows he's in. We better tell him before our next gig! Jonny actually works as a musician and composer for his "day job", so we're counting on his experience and professionality to rub off on the rest of us.
Marek is last in the list only due to the whims of the alphabet. I'm sure at some point he'll revolt and change his name to "Ian" just to get to the top of the list. If so, that's OK, he really ought to be there. Any decent-sounding recordings we release are entirely thanks to Marek's finely-honed sense of hearing. And his giant cans of beer.