It is GREAT you are wanted. I am wanted too. Ask anyone over 30 on this site how many times they were courted with "You are brilliant! You do 100% of the work and I will split it with you 50/50!"
Not everything is about money until it is about money so I will focus on the BIG questions to help steer you.
First - is this something you are SO passionate about that money - even the smallest amount is trivial?
Second - does the team you are forming have enough mastery of their roles with proven foundations of success to accomplish the goal?
Third - timing of two years until capitalization is a MASSIVE red flag. MASSIVE. Like Godzilla showing up at Chili's for Taco Tuesday red flag. Seed capital is EVERYWHERE for the right solutions, a fully vetted Bplan and mockup/working demo. If you are a even a medium level disruptor active angels will pounce with enough to pay core team for a year.
Fourth - if the title does not help you in the future then ignore it so focus on the core business functions and how much time you need to facilitate them.
Fifth - time - I have been on 3 founder boards at once AND had a day job that had me in and out of shop after shop evaluating business or product market readiness. It is not about time management but about time investment.
Here is a formula I use to determine yay or nay:
Will the investment TIME [Application of Wisdom + Effort] = REWARD [a small basket of gold coins + preferred stock (actual stock NOT options) + personal brand/career advancement]?
EVERY problem has a solution my friend, but are these requestors of your excellence capable of suspending ego to obtain the solution? Are you willing to risk their words as down payments on your future without them risking capital?
Good luck, and stay awesome!