Is it ok to cook chicken above beef in a smoker?

No, you should not cook chicken above beef in a smoker. You'll end up with chicken contaminated with beef drippings, which potentially may contain harmful bacteria like E. coli.

To prevent contaminating other foods, beef, pork and lamb steaks, chops and roasts should always be cooked to an internal temperature of at least 145 °F as measured with a food thermometer before removing them from the smoker—regardless of color. For safety and quality, allow meat to rest for at least three minutes before carving or consuming.