If you like Tame Impala you should check out Sleepy Sun who do a similar sort of thing and in my opinion, one of the best albums of the year in Fever. Plenty of good psych comps about would prob be your best way to get into older stuff, in particular Nuggets (although a lot of it is more pre-psych garage rock). The Psychedelic Sounds of The 13th Floor Elevators, Love - Forever Changes