1.
there is a "dumbzombie" script somewhere that makes unarmed NPCs attack with the grenade throwing animation (looks like they try to hit you with the flat hand in the face.
2.
The STORE offers a FREE knight for download that has (interestingly) no weapon but a "powerful fist punch" (at least the text says so)
3.
All characters from MP20 have a fistpunch animation (they are all Fantasy but offer a variety of weapons they fight with in addition)
And a small hint: all Sstock NPCs in the FPSC are scaled down to 80% by default(for reasons completely beyond me). Scale them up to 100 % (just open the .fpe file, there is an entry called "scale" and edit this - that looks way better from the player perspective when doing close combat
In case you find my grammar and spelling weird ---> native German speaker ^^