Elizabeth May is one of
two sitting members and the leader of the Green party.
Bruce Hyer is the second sitting member; he was elected as an NDP MP, left the party over its gun registry position to sit as independent, and in December 2013 joined the Green party.
Elizabeth May did not vote in favour of going to war, but also was not able
to speak on the issue because of a motion to close debate. One non-whipped vote can't fairly be said to represent the party as a whole, or to define the relative "progressiveness" of the party or even its (2) elected representatives.
BTW, on the subject of ranked ballots potentially in the 2018 municipal election, consider that a proportional federal system in 2008 would have seen the Greens win 21 seats (6.8% of 308), instead of zero. Almost a million Canadian voters had no representation in that Parliament thanks to first-past-the-post.