renjay – you seem to be confusing how the voting majority to pass a special resolution is applied, where it’s not ≥75% of Owners in the Plan who need to vote that way, but rather ≥75% of those in attendance at the Meeting, both personally and by proxy.
Further, you only need a simple majority vote when it comes to electing members of the Executive Committee (E/C), and as those members’ tenure automatically expires at each Annual General Meeting (AGM), if/when the vexatious Owner nominates for re-election at your upcoming AGM, a vote against that by >50% of those in attendance would defeat that nomination.
So whilst you’ll probably still have to do some more lobbying in order to have like-minded Owners attend the AGM or to provide you with their proxies in order to obtain the >50% to vote-down the unwanted E/C nomination, be conscious of the fact that in circumstances where it’s often difficult to have people even nominate for election, there’s no minimum number required to form an E/C (only a max. of 9) and that individual Members once elected can hold multiple positions.