Where better to start than two epitomes of Indie The Killers, covering no other than Interpol.
Not sure if we're venturing into Post-post/Alternative but hey, what's a better cover than:
With Indie being a fairly varied Genre its hard to pick just a few, espcially ones that are just not another Live Lounge Version. Anyway no good covers blog could exclude this next one
Heres a few others on a spotify playlist
Spotify Playlist - Indie Covers
Dancing On My Own - Calum Scott
No Diggity - Chet Faker
99 Problems - Hugo