Tools: The Bass

One of the most famous bass sounds for the 90s Eurodance was:

TX81Z Lately Bass

You can download the patch for free from here:
http://patcharena.com/free-yamaha-tx81z-lately-bass-pack/

tip: if you cannot succesfully load the file into your sfz player, just copy the .sfz file inside the samples directory and also change the "default_path= "

Yamaha DX7 or Juno 106 could also be an alternative