I counted 24 Eurotour titles for Ralf (1992-2017 !! That's 25 years.) Ortmann has won 14, Niels 11 and interestingly Nick v/d Berg quite impressive 10.
FWIW, Filler has won 8 ET's starting from 2021.
https://en.wikipedia.org/wiki/List_of_Euro_Tour_tournaments