As you well know the Greek usage for just one is just to say wife. and the Greek here says first or at least one wife.
As you well know that I know that it DID mean what you calim; in at least ONE instance where it was found; but in THESE places, the smart money bets on what trained translators has said, and NOT on what some obscure LDS apologists HOPES it means.
They should have tried to convince the UNITED STATES GOVERNMENT of this in the 1890's!