I feel like us old duckts are losing control here.I'd go with "Smells Like Teen Spirit" with Nirvana and would have to go with "Straight Outta Compton" by NWA. The first pretty much killed hair metal and the other unleashed a whole new style of rap to the mainstream.
Take It Easy was the 1st song on the Eagles debut album. Eagles.
Here's a early version. Without Felder or Walsh. With Bernie Leadon and Randy Meisner. Along with Jackson Browne on piano.
If you are impatient, skip to about 1:40. It will be familiar if you are anywhere near my ancient status.