Dairyland is a part of Sentry Insurance and as far as I know in washington they are only for high risk insurance when pertaining to automobiles. They also have motorcycle and life insurance, but it doesn't look like they have normal car insurance.
We also have Cotton States Insurance. Don't know their rates here as I have never used them.
Like vjf915 said, you are going to have to do your own research. Insurance is calculated based on a ton of factors that are personal to the person being insured. One of them unfortunately being your credit score. Another thing that comes into play is where you live. Even if you don't insure for theft, your rates are still based on theft statistics in your area. Mine went up $15 a month just by moving from Puyallup to Tacoma literally 8 minutes away.