A C-corp, an LLC and a DBA (now closed).
The LLC is a flowthrough and we could not prevent high profits from flowing to our personal 1040's and incurred high personal tax rates a few years ago. Our C-Corp will start showing a profit this fiscal year and we expect to be able to control that flow of income and divide it among the taxable entities to lower our tax burden which is legal.
A C-Corp is a recognized entity and can have not only retained earnings but it's own section 179 deduction as well as offer benefits like paying for non-covered medical expenses. No other entity can do that. A C-Corp, being a recognized entity, is also protected under the Constitution. Your LLC, LLP, S-corp and DBA are not.
Also, I have not yet seen a case cited where the IRS changes salary to a dividend. Please cite that. I have seen reports going the other way with an S-Corp
S Corporations and Salary Payments to Shareholders
Additionally, you cite collecting 10% for capital gains but the payroll tax is 15.3% so I don't see where you are going with that one.
Finally, the IRS has not ruled on LLC passthrough earnings being subject at all to payroll taxes. There is a lot of room there but we do the payments for direct work but not for income from rentals and such that are passive in nature.
So, having done a DBA, and LLC and a C-Corp, I prefer the C over all others.