One of the bands that played psychedelic rock was The Beatles. For example, Lucy in the Sky with Diamonds, Strawberry Fields, and Blue Jay Way.
Iron butterfly, jefferson airplane etc
MGMT
The Grateful Dead. Jefferson Airplane.The Byrds.Hawkwind.Procul Harum.
No, The Answer are a Northern Irish hard rock and blues-rock band from Newcastle and Downpatrick, County Down, Northern Ireland.