Adele's 21 and Rumours were recorded during or after personal break up's .
Thriller on the whole is a fun pop album , although it does touch on some adult themes , 21 certainly is not fun it charts a sad chapter in Adele's life .
Rumours era saw the two couples in that band going their sheprate ways "Go Your Own Way" is a 70's "Rolling In The Deep" .
So if your looking for a comparison the Fleetwood Mac album is much closer to 21 than Thriller .
The later Beatles and ABBA albums are also closer in they deal with elements of break up within their songs .
Thriller and 21 are very successful albums thats all they have in common , but artistically they are polls apart in my opinion