fwiw, just built a fanless MOCK with an asus h370-i mini-ITX mobo plus an i7-8700. so far, works flawlessly with the exception that the wi-fi is not supported. the mobo has all your specs plus it has two m.2 NVMe slots… i am using one for ROCK and the other for music storage. (remember, ROCK only recognizes one additional internal drive.)
i have no expectation of roon support beyond the community here and if it ever become incompatible i will just install linux with roon core.
caveats here are: i have only been using it for about 10 days, and outputting to one zone with upsampling to dsd128 so far.
also, for a good discussion of processors for a MOCK, see this thread: