I only know Gotan Project, would someone please advise me in this area ?
Find any and every Astor Piazzolla record you can. He was a brilliant composer and a great bandoneon player.
If you're thinking of the more traditional tango, try Angel Villoldo, Gerardo Matos RodrÃguez, Julian Plaza, Pedro Laurenz to name a few. They composed great and memorable tunes, but Piazzolla is the one who brought great admirable changes to the tango.
Thank you a lot dude