Basic music player

I'm looking for suggestions for a basic music player ie one that plays MP3's and playlists. I don't need any streaming radio stations, I don't need music suggestions, I don't want it to use data, all I want is a basic music player. Native playlist creation would be a nice feature too. For some reason, even though all my music is on my phone (actually external SD), Play Music sometimes tells me something is not available in "downloaded only" mode.

Thanks.

Eric