Love the Yardbirds, but the Kinks need some mention too. ‘You Really Got Me’ was released August 1964 and sounded way different than most of the other rock/pop songs at the time. It kind of set the tone for a lot of the hard rock bands that followed.
And The Who, in 1965 My Generation was unlike anything that came out before in terms of in-your-face attitude. It was literally the first "Punk Rock" song.