I first saw Eilen Jewell in a tiny venue in Brighton in 2008 there was only one album available on general release then, Letters from Sinners and Strangers (only ever on CD) which is still a favourite.( They had copies of Boundary County which was their first self released album on sale at the gig and my copy is signed by all the band. That is the now being re-released on vinyl.)
My other great favourite is Sea of Tears as I saw them live quite a few times and those two albums where the mainstay of their live sets.
Having said that I took a few friends to see them a few years later when they released Queen of the Minor Key and that is their favourite.
Audiences are pretty 'normal' these days but when I first saw them half the audience were dressed in 50s rockabilly style both male and female and danced right through the gig, not sure if that happened everywhere or maybe that was just Brighton!
Pick any one of those three and if you like what you hear you will soon buy the others!