I see Wiki says Fleetwood Mac is yacht rock too. So, a list of some tier1 covers I've bookmarked over the last few years. This list happens to exclude tribute band(s) that cover only F Mac.
P.S. FYI I don't put a cover performance into my "tier1" category if the vocals performance is either uninteresting enough or less than great/excellent from a technical standpoint including sufficient pitch accuracy. Most or all of the great vocalists here, I've heard them do less than tier1 in some other performance or two on youtube – so, to me this makes their select performances worthwhile to bookmark once encountered.
https://youtu.be/-oB0fH00k38
https://youtu.be/IZd1HVkXUyI
https://youtu.be/V1LhC1zGouc
https://youtu.be/ogJeEbu5Of4
https://youtu.be/pOL0Ke_WlMI
https://youtu.be/LW59BGV5ku4
https://youtu.be/TMiNIJRsxVQ
https://youtu.be/TQlY_8u6xSc
Bookmarks