I need a shrub that I can grow into a solid hedge. Area is about 90ft. long. Customer wants it to be maintained at about chest height. I can get China Girl Holly, Wintergem Boxwood, Arbrovite Emeral Green, Koren Spice Vibernum, Juddi Vibernum. The area is clay full sun. What is a good one to use. I don't want to replace dead ones. Wouldn't the vibernum grow the fastest.