best strain sunflowers for sunflower seeds

I intend to grow a lot of sunflowers for the seeds this year. I would like recommendations for strains that produce nice plump seeds and also resist pest infestation. Has anyone noticed a strain that resists pests better than others?
Any recommendation for companion planting and trap plants?

There is a Mammoth Russian which has large seeds.  Also now a gigantic variety that has seeds over an inch long.  Neither are pest resistant and I have to bag them once there start to mature to keep the finches and squirrels from eating them.  The deer and groundhogs, raccoons are also a problem.  I save citrus bags, that mesh type, which are very convenient to slip over them and tie with a rubber band or long piece of yarn.  It helps if the cats are around to keep squirrels run off because they can rip off the bags.  If you just want to press for oil, use those black oil seed varieties, which are 40% oil.