I love Mr Fowler's strikers. I actually just received an order a couple of weeks back where I had reordered a couple of my favorites so that I would have spares. You never know what can happen to a striker.
His Black Locust is my favorite, followed by Snakewood.
Lots of other great ones: Tulipwood, Ipe, Black Palm, Dymondwood, etc.
On my last order, he sent me a free striker (he has done that in the past, but not sure what constitutes a free one) made from Meranti. I'd never heard of it, but it is another great all around striker that seems to work on any call.