Aside from lifting about 20 huge obelisks simultaneously, pulling down ship-size balconies, demolishing large portions of caves, defeating groups of force sensitive Zabrak warriors with lightning, etc, the best way to determine how powerful Dooku truly is, is by examining the feats of powerful force users whom were absolutely no match for Dooku. So,
Kenobi:
http://www.comicvine.com/profile/shootingnova/blog/obi-wan-kenobi-respect-thread/96476/
^ Stomped by Dooku.
Vos:
http://www.comicvine.com/forums/gen-discussion-1/quinlan-vos-respect-thread-1566791/
^ Stomped by Dooku.
Bulq:
http://www.comicvine.com/forums/gen-discussion-1/sora-bulq-respect-thread-1653903/
^ Him and Tholme both Stomped simultaneously by Dooku.
Ventress:
http://www.comicvine.com/forums/gen-discussion-1/asaji-ventress-respect-thread-1604363/
Stomped by Dooku.
Tholme:
http://www.comicvine.com/forums/gen-discussion-1/tholme-respect-thread-1657587/
^ Him and Bulq combined, stomped by Dooku.
It should also be worth noting that not only has Dooku dominated these individuals with the force, but has also handed them their asses in saber matches, indicating Dooku's greatness as an all around combatant. He's even dominated some of these individuals at the same time. Even Ventress, with the help of two formidable nightsister warriors, was bested by a heavily drugged and blinded Dooku in a saber battle, and then force dominated by him with a lightning attack that sent her and her companions flying out of Dooku's palace.
Not to mention Dooku easily dominated Savage, who was, at the time, powerful enough to force push a starship a pretty long distance and over a landing platform (if you pay attention, the ship was landed pretty far from the edge of the landing platform).
I'm aware that The Wrath has also defeated powerful opponents, but of Ventress and Kenobi level? I don't think so. Definitely not with the same ease as Dooku has.