I used it in the past on Linux and liked it's relatively small memory footprint though I am currently on Strawberry ( a fork of Clementine).
Wasn't Amarok (from which Clementine was forked) recently brought back from the dead?
Yes, Amarok is also active again though it's UI is reasonably different from Clementine now.
Is there a really complete Linux audio player? By complete I mean : shuffle, queue management and reorganization, cover support, sort by album, artist, etc... Have good tools, like eq or compressor.
One day I searched and tried many but didn't find a good one
You are supposed to use the metadata editing if it is not already correct then it well automatically sort them for you. You can edit multiple tracks at once to set the album in one go for example.