Earlier this year I went on a Johto journey to find a specific type of drum soundfont (which I still haven't quite found, yet!), and came across this collection provided by flstudiomusic.com. While these soundfonts may all work in FL Studio, they aren't all restricted to use in FL Studio.
I was able to use quite a bit of these in GarageBand, and am rather happy with a lot of the things I've heard (from those that worked of course).
Basically if you're in need of a beat solution, I highly recommend having a look through this vast library.
The selection is rather broad, though it seems not much can be said for the presence of any orchestra related percussion. In my case, it's okay, as I already have an orchestra drum kit from a GarageBand Jam Pack.
I used some of these soundfonts in a recent project for a friend, and I do say it was rather fun making a drum/percussion only number.