Question: what fast food restaurant has the best onion rings?
Answer: Culver's. We don't highlight Culver's nearly enough – they're one of the highest quality fast food joints around but often get overshadowed by bigger names in the industry. ... 
Portillo's. ... 
Buffalo Wild Wings. ... 
Whataburger. ... 
Arby's. ... 
Dairy Queen. ... 
Steak 'N Shake. ... 
Hardee's.