I never filled my nonresident Panhandle elk. Is this tag usable for a lesser species; like dear, bear, mountain lion, or wolves

A nonresident elk or deer tag, excluding nonresident junior mentored deer and elk tags, are valid to take a black bear, mountain lion, or gray wolf instead of a deer or elk, if a season is open for that species, where and when the deer or elk tag is valid, and if there is an open deer or elk season in that same unit.  In your case, if you purchased a Panhandle B tag that was valid until Oct. 24, then no, you cannot use it for other species after that date.