There a good group to have around in smaller bits though. Someone through training and tools that can realistically hold their own against the force users.
Highlighted the important part. 99.9% of the time, Mandalorians (or for that matter, ANY non-Force using 'elites') defeating Force users is handled terribly.
Yes, I can believe that Jango Fett can score a lucky kill on a distracted Jedi, or hold his own against Obi-Wan long enough to escape. But him allegedly killing Jedi with his bare hands? That's f*cking retarded