if you want somethin soothing/chill/mellow try out:

Blind Faith- cant find my way home

the byrds- mr. tambourine man

Love (w/ arthur lee) is a sweet band too from the 60s. ANything on the album forever changes is good. Try out: andmoreagain

Mama's and the Papa's: monday, monday

oasis- champagne supernova

the rolling stones- lady jane

donovan- catch the wind

velvet underground: sunday morning, femme fatale, who loves the sun

and a bunch more. all of those are pretty slow and mellow.