Rich Little always will be best known as someone other than himself.A master mimic, Little, who turns 72 next month, has a repertoire of more than 200 impressions, from celebrities such as Charlton Heston, Johnny Carson, and Orson Welles to the past 10 U.S. presidents up through and including Barack Obama.A longtime Las Vegas resident, Little is coming through northwest Ohio with a new one-man sho