Les Mentettes - They sing in English, so if you're looking for Spanish vocals you'll have to look elsewhere.
http://lesmentettes.bandcamp.com/
107Faunos - indie rock
https://www.youtube....h?v=AKaV8SEydb4
Bahia Inutil - Chilean group
https://soundcloud.com/bahiainutil
La Bombachita - Drumming + instruments, big group
Fun live. They're harder to google thanks to an underwear shop by the same name, but here's a sample:
http://www.penta-eve...rectlink&id=924
Los Fabulosos Cadillacs - ska
https://www.youtube....h?v=nAA4z5B-RH4
Mi amigo Invencible - indie rock. check out the compilation 2007-2011 in the middle of the page
https://soundcloud.c...amigoinvencible
Heatbeat - trance - they're dj's & producers so they've got their own songs and remixes
https://soundcloud.com/heatbeat
Chris Schweizer - trance dj
Juana Molina - female vocalist, established
https://www.youtube....h?v=NsMYnERBR8Y
Gabriela Bisserier - female vocalist, new
http://gabrielabisse...mp.com/releases
Charly Garcia - Maybe translate Promesas Sobre el Bidet for your prof
https://www.youtube....h?v=P-x184UJGBM
Babasonics - rock, you can probably find videos with subtitles as they've been around. bonus - their videos are ridiculous (Tormento, Deshoras). Not my thing but ok for homework
https://www.youtube....h?v=LKutfA86FiY
Fun to translate - song about Argentina by Mirah - parts in English and Spanish
https://www.youtube....h?v=oBWKXvrGdk0
Gato Barbieri - jazz sax
https://www.youtube....h?v=uOqlebrto0w
Astor Piazzola - modern tango composition
https://www.youtube....h?v=oB-RS000NLs
Here is a more traditional smattering of Argentine rock - Fito Paez, Patricio Rey y sus redonditos, Bersuit, Enanitos Verdes, Caputechu Mechu, Divididos, Los Piojos, Los Autenticos Decadentes, Vicentico
Soda Stereo (80s/90s) and then the independent work of Gustavo Ceruti
https://www.youtube....h?v=kNvTIyNpYSE
https://www.youtube....h?v=C2VuyuX5HdY
Celeste Carballo - smoky voice...but I only like bits of her work
https://www.youtube....h?v=O0kvnKtUWSU