Seems TLJ will end up being the best selling blu ray of 2018 in the US (was released in April):-
https://www.the-numbers.com/home-market/bluray-sales/2018
^ Solo seems to have sold well too (was released towards the end of September).
Edit: DVD sales of 2018 in the US - https://www.the-numbers.com/home-market/dvd-sales/2018