SS certainly requires much greater athleticism, so that's probably a no-go.
3B has a longer throw but SS requires a stronger arm as well as much greater agility and speed.
1B may require the least athleticism.
The order of importance if not athleticism per sabrematics:
C
SS
2B
CF
3B
RF
LF
1B
Yeah, but if your hands don't work for 3B, they don't work for 1B either. Within certain limits, you can be a lardass at 1B, but if you can't field hard hit grounders and scoop throws, you'll be a butcher there even if you can move.
