What is the best hay?

I see so much banter in various rabbit groups about how timothy hay is the bees knees and the only best hay for rabbits. I wholeheartedly disagree.
Diversity is the key to the best health. This may look like a just a bunch of grass, but it's really not.
Burdock, stinging nettle, plantain, thistles, curly and yellow dock, wild daisies, pineapple weed, wild chamomile, several types of creeping ground cover, red and white clover, lamb's quarter, dandelion, red rooted pigweed, alfalfa and at least a half dozen different varieties of grasses grow and live in this field. This is what I know of for sure. These plants are a vast wealth of various nutrients and far healthier than a limited diet of timothy.
Everything on my farm gets this hay as part of their regular ration. If you buy your hay, buy mixed field hay from a local farmer if you can! If you live in the city, look for a feed store, a small animal swap or a small stock social media group in your area. Often times they either will be selling small square bales or be able to point you in the right direction.