Spot Monkey who cant sell AT ALL and uses his athletic ability to try to make a match more exciting yet fails to create a good match with anyone he has, at least as a singles competitor. overall just a horrible wrestler and its the same reason I think RVD is bad as well although he can have some great matches now and again, kofi? Only matches I like with him are the ones wherre he teams with Evan Bourne. Also you mentioned Nash and Batista in the list of bad workers, Nash has had some classics with Taker,HBK, and Bret and Batista in his first run had a handful of matches I would call great, his matches with Taker are all awesome but WM 23 is on another world. Also HIAC with HHH is amazing as well.
Cena has had good matches with subpar workers too, got a great match out of Orton at NWO 2008 and got an awesome Last man standing match with Batista at Extreme Rules 2010, to say he cant work match is just because people are sick of his character, but atm he is a top 5 worker on the roster behind Bryan,Brock,Cesaro, and Sheamus.
SHEAMUS, theres a guy who gets no credit at all, that man is such a great wrestler, almost reminds me of a skinnier version of Vader, great worker.