I think anything by David Thiel has been incredible, the man has a talent for creating music that is meant for pinball. David did a lot of incredible audio work for The Hobbit. I think The Hobbit has one of the most impressive pinball audio packages thanks to the work done by David and the 30+ custom tracks by Two Steps From Hell. Also, Jerry Thompson's work on Ghostbusters is incredible. He took multiple licensed tracks from the Ghostbusters movie and added a pinball twist / vibe to each. Finally, have to mention Chris Granner. He knocked it out of the park with LOTR music / sound and then JJP brought him back for WOZ which has another incredible audio offering.