Here are the places I originally looked at when planning for our SHUX stay in 2018:
P2B Bistro and Bar - Pinnacle Hotel restaurant
Nero Belgian Waffle Bar
Hato Popo Japanese
The Holy Crab
Mahoney & Sons
Cactus Club Cafe Coal Harbor
Showcase Restaurant & Bar - Marriott restaurant, good but spendy
H2 Rotisserie & Bar
Obviously we didn’t go to all of these places, but we did eat breakfast at P2B on our last day there and it was good and not too expensive. We tried De Dutch the day before and had miserable service for mediocre food, so I cannot recommend there.
We ate at Cactus Club, which was good with maybe slightly above average prices and the Holy Crab, which was quite the walk to get to but very good, though a little spendy. The previous year we had dined at Showcase and it was really good, but expensive.
Joey’s restaurant, as mentioned by @superjaz, was delicious and not prohibitively expensive. The first night we joined a meet-up at the Lion’s Pub which was tasty and the prices seemed reasonable.
Hope this helps.