I use the Prosense theme for alot of my websites, just type in Prosense theme in G search, and you will find it.
Use adsense based on your site type and relevant to content. Also SEOed themes are also good and you need to add other many good plugins to make your WP site adsense friendly.
themespinner.com has some good adsense ready themes. I use Tauren pro on my mma related site and have above average ctr.
I sell some at http://www.google-adsense-templates.co.uk/ and use them on my own sites and the one with the best CTR is Talian (around 6%). They are also fully SEO'd, you will be able to find just as good WordPress themes to add AdSense to, (not hard to add AdSense to a theme) but you won't find better SEO'd coding in a WordPress theme. I optimised these themes for my own sites, so they have to be fully SEO'd. I also give some away for free at another site, but have only updated one of them recently at http://www.morearnings.com/2006/08/13/wordpress-theme-blix-with-google-adsense/ I last updated that one for WordPress 2.5, should work with 2.7 since the paid for version didn't need an update to work with 2.6 and 2.7. This is also SEO'd, but not as well as the other ones. There's a list of plugins on the first site I use for SEO reasons as well. David Law