I'd love to see an Electoral Reform Party.

They have only two pillars once elected:

1. They will only vote "Yes" to legislation to switch Canada to Single Transferable Vote for the next election, with details to be determined by Elections Canada.
2. They will then vote as a block in complete solidarity with the party that introduced the legislation until the next election, when the party will disband.

Then, more generally, they campaign about how broken FPTP is and how completely compatible STV is to Canadian politics:

1. Keep geographic representation as required by the Constitution.
2. Roughly proportional government, without allowing tiny fringe parties from derailing our political systems.
3. No more "safe seats" for incumbents, so everyone is truly accountable to their constituents.
4. Very good chance that you will have a local MP that aligns with your political views to represent you.
5. Can vote for parties or for individuals within the parties, so it can be simple to vote, but can also scale to political knowledge level and interest.

I could go on. Like that it's been a successful system in Ireland for over a century.