This is a page of bass drum rhythms I use for pad practice— I have one of those Gibraltar bass drum practice pads I sometimes use. These are good for anything with a running 8th note rhythm (or 16th note rhythm, if you double time the ostinatos): accents, mixed stickings, flams, drags, short rolls.
The names I’ve given for each rhythm are just convenient shorthand, for their broad similarity to rhythms/parts associated with those styles. Part of what I don’t like about practicing with bass drum ostinatos is the tendency to get locked into the ostinato rhythm— so memorize these, learn to change rhythms on the fly, and eventually improvise your own variations. Think of them all as variations on each other, and practice using them interchangeably. It’s good practice to emphasize the & of 2 on most of the rhythms, or the 3 on the two “samba” rhythms.