Tornadus, Reshiram, Kyurem, Virizion, Terrikion, Colbion, and Landerous.
Event: Victini, Genesect, Keldeo, and Meloetta
White: Zekrom and Thunderous
This or this link, from Psypokes and Serebii respectively, shows the list of the Legendary Pokemon available currently in Pokemon Black/White.
So, basically the Legends obtained are :-
Thundurus/Tornadus from White/Black respectively
to obtain both})
Hop This Helps :)