Better Marching Percussion?

I'll cut right to the point - The current marching percussion in MuseScore 2 is, to put it kindly, nothing to be proud of. I was wondering if anybody has the knowledge to get the Synthgms.sf2 from Finale to work correctly (i.e. drums not playing correct notes, that sort of thing) or if they know of a decent .sfz or .sf2/3 that truly replicates the sound of a marching snare, set of quint toms, and a 5 bass line?
Thank you!