Few thoughts. Hard to pin down one.
From the 60s
RUSSELL MORRIS
Real Thing
Wings of an Eagle
http://www.youtube.com/results?search_query=russell+morris+real+thing&search_type=&aq=5&oq=russell+morris+
70s
DOOBY BROS.
Minute by Minute
http://www.youtube.com/watch?v=OdXP5Yjtq9Q
80s
?
90s
?
Naughties
GEORGE MICHAEL
Flawless
http://www.youtube.com/watch?v=Gl-oh-ecvBc&feature=related
