It’s hard to limit what can be said about Orman Clark and the team behind Themezilla. Why? Because he is also the guy behind PremiumPixels.com (free stuff for aspiring designers) and overall good design.
I’ve personally used or worked with a number of Orman’s themes (now “Themezilla’s Themes”) and can vouch for their ease of use and customer support.
It’s a good place to start if you want to start somewhere other than ThemeForest.
They also have some plugins worth checking out.