Can I bring someone from overseas to perform in my restaurant?

You need to hire an immigration attorney and since you are looking for two employees, it worths spending on a good immigration attorney. Good luck.

GMC is not related to your employment. You still can apply for naturalization although unemployed.

EAD pending 82 days

Wait until 90 days have passed. Infopass is your best option.

What is the post-approval paperwork that I need to complete in order to extend my drivers' license?

As long as you are able to show some documentation that your status has been extended (or is pending) you should be able to renew your driver's...

I765 expedite request

There is no premium processing for EAD. For more information read I-765 instruction.

F1 to H4-EAD. What is currently the best option - concurrent filing? or H4 first and then EAD application?

You have asked so many detailed questions. Consult with an immigration attorney to help you out.

How long does it take to be notified after non immigrant visa documentation has been submitted in Venezuela?

No one can give a right and accurate answer except the consulate. You should contact them by email.

Applying for EAD renewal after expiration

You are not allowed to work once your EAD has expired.

When is the earliest I bring a parent to USA after becoming a resident on EB2?

You still have a long way to go. Permanent residents will be eligible to apply for naturalization after 5 years they obtain the green card. At this...

Is it possible for the sponsorship to be approved?

I agree with my colleagues. You cannot change since you overstayed.