If you want to go in-wall then those are pretty good. The first link you posted gets you your front L/C/R speakers and 2 Atmos speakers. I would stick to the RT center speaker and not get the additional LS you linked. For one you’d have 2 centers and second I wouldn’t match the LS with the RT series.

You’d need 2 additional RC85i‘s for your surrounds (they don’t go in the back, though, they would go on the sides as they’re surrounds and not surround backs (which you’d have in a 7.x.x configuration).

So these + these would get you your 5 ear level speakers and 2 Atmos speakers. Then you’d need one or two subs.