For making Protracker MODs, Protracker should be best. Keep in mind there are other music module formats that you might want to investigate, that is, depending on your needs. It's best to start with Protracker anyway, since most have "nicked" its interface,,, so you can almost seamlessly go from one to the other.
Other non-protracker trackers I recommend: OctaMed, AHX and MusicLine. (You can make Protracker MODs with Octamed)