Any one is fine. The choice of film speed would depend on the camera to an extent. The rest is subjective. HP5 is similar to Kodak Tri-X. Their Delta line is finer grained (similar to Kodak Tmax).
Darn autocorrect ! Sorry, I fixed my previous post.
Yes, Graflex 22 will take any 120 film, but you will need an external light meter. With Brownie is different, it takes 620 film, no more in regular production. I respool my own, but it is tricky. You can buy some online, but it is more costly. Brownie does not have any controls, when choosing film for it remember, that in it's times the standard film was of ISO 50. If you use faster film you have to pull it in development or fix in the front of the lens some filter of known density. Like that: