For my AWD, because I wanted to run all-seasons, the biggest available rear tire combo for 19" is:
245 x 35 x 19 = 25.8" dia, 784 revs/mile
285 x 30 x 19 = 25.7" dia, 784 revs/mile
Which is a better match than stock.
https://tiresize.com/calculator/
I would have preferred running 255/295, but 295's are not available for AS 19's.