I live in Argentina and we don't have a great variety here.. only the more popular brands.
I have been using Wilson Pro Grip for years and never really convinced me. I don't find as tacky as I would like, they are too thin, they wear off and get dirty too fast.
Way tackier than Wilson Pro overgrip are:
Solinco Wonder Grip(currently using)
Hacker overgrips(probably a local brand)