I wouldn't go down the route of copying exact actions, but do more like what MuchMore said. Sure, there can be things which are borrowed off certain bowlers, but there's no point trying to get everything exactly like a real bowler, else JK will never finish!
I would go for the following for fast/medium bowlers:
Front-on (like Flintoff/Harmison)
Side-on (like Anderson)
No-jump-in-delivery-stride (like McGrath/Collingwood and probably lots more)
Then for leg-spin I'd do:
Lazy (Shane Warne-style, walk up and bowl it)
Boundy (Kumble-ish, probably some younger spinners too)
And for off-spin:
Will actions have effect on bowling? I would love to see a high arm action getting more bounce and things like that.