I've seen quite a few people well known in the UK:
Jake Quickenden (singer, I'm a Celebrity, X-Factor): Small and uncut with a lot of foreskin
Olly Alexander (singer Years and Years): Normal uncut (serious BO)
Cel Spellman: (actor and Radio 1) Normal uncut
Tom Fletcher (bank Mc Fly): Average uncut slightly longer than average foreskin
Freddie Fox (actor various): Average uncut but head showing
Calvin Demba (actor Hollyoaks): Medium length uncut, leans to one side
Ben Hardy (actor Eastenders and X Men): Normal uncut
Dean Smith (actor Waterloo Rd): Small and uncut with long foreskin
Robert Lindsay (actor various incl My Family): average uncut but very dark skinned
The one which I suspect that nobody will believe, but did happen at the Clipper Lounger in the Mandarin Oriental Hotel in Hong Kong was George Clooney who was average cut and quite dark (appreciate people won't believe it)