Here are some C-corp tax benefits from some notes I have:
IRS Section 74 - Yearly longevity bonus
IRS Section 74 - Yearly safety bonus
IRS Section 127 - Tuition reimbursement - This is a big one, and I used my Corp to pay, tax free for my pilot's license, even though my business has nothing to do with aviation. This is because there is no requirement that it be business related.
IRS Section 129 - Child care
IRS Section 79 - Group term life insurance
IRS Section 105 - Personal health insurance reimbursement (NOT just Section 106 medical plan)
IRS Section 162 - Seminars AND related meals and lodging
IRS Section 132 - Physical fitness facility
IRS Section 243 - Dividends received from another corp. held by a parent corp.
IRS Section 132 - De-minimis Fringes
Potentially, Section 119, for home-based businesses.
There is key-person life insurance, non-qualified deferred compensation and profit sharing, and a few others which I may be forgetting. LLC's cannot do income up-streaming which Corps can engage in. I am not at my office, so I KNOW some/many of these may not be applicable only to the Corporation/employee setup, and of course things like the Section 179 deduction are available to all entities. (which is only interesting to those who are considering the benefits of forming ANY entity as opposed to being a sole proprietor).
Finally, the Corporation is the only entity that can determine its own tax year. When you pay your taxes can be as valuable as what taxes you pay sometimes. The Corporation is not a panacea anymore than an LLC is, but there are many situations when it is definitely better, because it is more flexible and has more methods by which to be tax efficient.