Best Hair Straighteners?

Em
I have the thickest frizzy hair literally with no shape. It's not wavy, curly, or straight. Just a big frizz ball. Probably because I've dyed my hair since the age of 12. Anyway, what's the best hair straighteners out there? Not Walmart shit. Tried them all. Not liking my CHI anymore either something better? Thanks in advance ladies! šŸ˜‰