Maximize a 41C - Challenge

[TallKey]

Task:
Maximize the utility of a 41C with 4 option ROMs/Modules.

Conditions:
List 4 modules meeting your use needs. Spirit of the challenge is to select ROMs prior to the likes of Diego* type modules. HEPAX, ZEN, CCD type modules are OK as they were released back in the day.

This is the best I can do with what I have at-hand:
TIME
QUAD MEM
X FUNCTIONS
PPC ROM

You do not have to own the module to list the module to kit out a 41C.

*Sorry Diego, your modules are far too capable for this challenge :-)