BetaPlayer is my favourite media player rather than Windows Media Player and it supports all these:
Video files (AVI,DIVX)
MPEG Movie files (MPEG,MPG,MPV,DAT)
MPEG Audio files (MP1,MP2,MP3,MPA)
Matroska files (MKV,MKA)
Ogg Vorbis files (OGG,OGM)
Windows waveform (WAV,RMP)
M3U,PLS playlist files (M3U,PLS)
video codecs: MPEG1,MPEG4 DivX/XviD,MS-MPEG4, M-JPEG
audio codecs: MPEG Audio (LibMad), Vorbis Audio (Tremor), AC-3 (LibA52), ADPCM, uLaw