There are 3 bands with the name No One:

1) No One was a four-piece nu metal music group from Chicago in the United States.

They started in 1994 known with the name Black Talon. They played at the Ozzfest Tour in 2001, appearing on the second stage. They also performed along such bands as System of a Down, Slipknot and Mudvayne in the Pledge of Allegiance Tour.

They released their one and only album, the self-titled No One on August 14, 2001 via Immortal Records.

Discography:

* No One (2001)

2) No One is a side project of Leif & Lars Hansen (Oneiroid Psychosis).

Leif basically locked himself in an attic room with little more than a sampler, a TV set, and a four track recorder. The resulting disjointed noise collage sat on a shelf for several months until Lars decided to transfer the sounds onto a digital eight track, while adding new samples and sound processing effects. These experiments were released in a very limited quantity on Feedback and are no longer available.

Free tracks can be downloaded at their offical website, http://oneiroidpsychosis.com/htm/noone.htm.

3) No One (stylized as NoOne (without the space)) is an unsigned acoustic act of Scott Carlson.
http://www.myspace.com/scottsacousticjunk .