Kenny McLean wouldn’t exactly be the most glamorous signing for Rangers this summer. The Scotland international, 32, isn’t exactly a signing in the Nils Koppen buy low sell high mould. But with the Rangers team accused of lacking the bite and belief to better second place, it might just prove one of the signings of the season. Norwich City’s Player of the Year last season, Kenny McLean is the most aggressive midfielder in a league of aggressive midfielders in the English Championship. With years of experience at the highest level down south too, Rangers would be signing a wise old midfield hea…