A bunch of my stompboxes see duty as percussion manglers. One you should seriously look at is some sort of auto-wah...on snares, these work great with a very fast attack and release, adding a quick filter sweep to the drum sound. I've gotten deep into the Chinese stompbox thing, and one bunch of sellers I've had a great time with are what I refer to as the "Brantford Pedal Mafia", aka a number of sellers in Brantford, ONT in the same general family who all deal in pedals AND who have inventories in both the USA and Canada, which makes things easy for quick shipment. You'll find the "Kingpin", aka mec.2009 at https://www.ebay.com/sch/mec.2009/m.html