WWE is Endeverafter and TNA is himself and his band.
endeverafter is the band that sings Jeff hardys 2008 entrance theme
no one, it is on WWE: Themes Vol. 7. only available online
His old WWE theme was performed by Endeverafter. Jeff's TNA theme's all feature Jeff himself on vocals.
Jeff Hardy Theme Song sounds like he sings it himself but it is not him. The singers of No More Words are called End-Ever-After!
the band moon fall sings marias entrance music.
Shawn Michaels sings his own entrance theme.
your mom sings mick foleys entrance music
Motorhead sings Triple H's entrance song