My three most successful flies on my local club water, where the rules are that only dries, nymphs or traditional wets are allowed, no lures or weighted flies, which limits the selection were -
1) Blue Tag
2) Blood Worm
3) Green Tag
Unfortunately, I don't know the names of 1) and 2) as I bought the originals in Ireland, found they worked great on my local water and copied them!
Lyall