Fully Dedicated: CMMG
Overall, it doesn't make a ton of sense to buy a fully built .22lr setup. There are less options and you're going to be paying a ton more vs buying a dedicated upper and lower separately. Our first recommendation is to set up a lower the way you like it and then buy one of the dedicated uppers mentioned in that section.
But, if you're set on going for a full build, CMMG is the way to go.
https://cmmg.com/resolute-mk4-22-lr-17