There are just so many to choose from:
1-Player, short flipper: WMS Magic City and WMS Heatwave. Excellent artwork, super gameplay
4 Player, long flipper:
WMS Aztec, Space Mission and Grand Prix
Bally Bow and Arrow, collect bonus in play, not so easy ABCD lower PF targets to double bonus, risky center PF extra ball shot, tricky gate back to shooter lane, spinners you can rip, skill shot and great theme.
Bally Wizard: awesome artwork, v. risky 5000 point shot (also for Special), cool flip flop targets. Good back-to-top action.