#2 K.S.V. Waregem
Waregem were a Belgian side that existed for 76 years – until 2001 – and were regulars in the Belgian top-flight from 1966 to 1996, with the exception of just 2 seasons.
The club never managed to win the league, but won the 1974 Domestic Cup and were runners-up in the competition in 1982, going on to beat Standard Liege in the Super Cup shortly after.
Their biggest claim to fame though came in the 1985/86 UEFA Cup. Waregem beat clubs like Osasuna, A.C. Milan and Hajduk Split to reach the semi-finals of the competition, before crashing out to F.C. Koln, losing 7-3 on aggregate.
Fortunes didn’t get much better and they ended up in the Belgian third division by 1999. Finally, financial difficulties led the club to merge with Zultse V.V. to form current top-flight outfit S.V. Zulte Waregem.