I jumped down the rimfire "rabbit hole" a long time ago. There are some remarkably accurate rimfires
out there. Many good suggestions have been made already. CZ 452, 453, 455, 457 rifles are good
shooters at a not outrageous price. A used Remington 541 S or T are great, but prices have escalated
lately. Tikka and Sako make quality rimfires. Anschutz needs no introduction.
Serious benchrest shooters will have Anschutz, Walther, Feinwerkbau, Remington 40X, Vudoo, Winchester
52's, or a couple of others, known for their accuracy. I have a Suhl 150 that is in the ¼" at 50 yards category.
But you are generally talking serious coin to acquire one in this group.
Ammunition is another consideration. Cheap 22 rimfire ammo will never win any matches, but can be fun
to plink cans and shoot a few grouse with. High quality rimfire ammo is spendy, but worth it to serious
competitors. It's all in what YOU want.

Dave.