The Tambaqui is a very neutral DAC and you are actually hearing the recording artifacts. Higher model Lampizator is not going to sugar coat a bad recordings, which most of the rock albums are. Those DACs will be more detailed and are supposed to bring more than life like images. You might be able to change the flavor by changing tubes.
I would suggest two things:
1. Try a Weiss 502 or 501. They have filters, like a vinyl emulation, which can tune the sound and the DAC is slightly on the warmer side which will favor rock music.
2. Change the Nucleus into something better. The Nucleus is not upto the snuff with the rest of your gear. If you are into Roon, try a Innous or a Lumin u1.