1) Swinsian is the most complete solution right now, which isn't saying much. It's one of the few music players that is actively being developed. It's decent.
2) Enqueue is a pretty competent player, but the developer has evaporated over 3 years ago.
3) Sonora is another abandonware option, with a very tiny feature set, but it kinda works as a playlist player. Also try the 1.0 version available from a link on their github.
4) Multiplatform ports Clementine, Tomahawk and Quod Libet are also options. Clementine has seemingly been abandoned. Tomahawk is actively developed, but has started obnoxiously shoving streaming music integration at the user. Quod Libet has nice sorting (not nice enough for the OP though) and nothing else.
5) Vox is a native option that strives a bit too hard for that minimal feeling (so forget about sorting) but ironically the UI has grown cramped and inexplicable while the feature set has bloated. Also now advertises the developer's crappy streaming music service.
6) Cog is yet another abandonware and is very barebones and frankly useless.
For the past 3 years or so OS X has been having rough times as far as 3rd-party software is concerned. This has been especially noticeable with audio players (but frankly OS X music players have always sucked). I hope the developers come back soon, or Steven saves us all with a MusicBee port
no but seriously, Steven - please do... we're pretty desperate here.