I haven't heard of any study like that on wrestling takedowns (doesn't mean that one doesn't exist though!).
There are a few things...
Depends on which type of wrestling. Freestyle and folkstyle takedowns will be fairly similar - not identical, but close. Greco will be different - all upper body obviously. Then there's mat wrestling, which will vary widely between the styles.
Very often, the move that "scores" ends up being more of a scramble, as opposed to a text book finish.
Now that I'm done nit-picking ;) I'll try to give you an 'off the top of my head' list for folkstyle (and probably freestyle too)...
Like you mentioned, a high-C to a double is definitely up there. Some others, in no particular order...
Standard double, head inside single to run the pipe, head inside single to go-behind whizzer counter, frontheadlock (various finishes), snapdown (about as basic as you can get), and ankle picks.
...purely my opinion, so take it with a grain of salt.