You say you want to empower “value creators” but all three suggestions listed are functions of stake, not value creation, so they don’t really achieve your stated objective.
I, too, am wracking my brain for a way to create a robust system to give weight to people who are truly engaged and “expert” but I am currently searching for workable ideas. Some sort of system of elected representatives might change the dynamic, but that also comes with its own set of issues.
Perhaps the way to balance the system is to give engaged participants a different role, such as proposal screening or vetos. I am increasingly of the mind that a strong system needs built-in and independent checks and balances rather than a one-dimensional approach as a function (directly or indirectly) of stake.