Best Wordpress theme(s) for authority website?

Hey guys,

I'm trying to create an authority website, and while I have everything else planned out, I am still having problems determining a proper theme for my site. The niche is healthcare, and I was thinking of a template similar to WebMD, with an internal search API built in, however, I'm kind of lost in this sense, so if anyone could point me towards Wordpress templates that have worked well for them (i.e. high readability, high conversions), I'd appreciate it. Note: they don't have to be medical themed; I was simply using that as an example.

I think the type of theme a site like webmd would be classed as is magazine style. May be worth searching for those types on themeforest etc.. there is lots of them out there.

I like working with genesis framework and themes, they can be highly customized.