Atletico Ottawa (Canadian Premier League), followed by Tottenham Hotspur.
Rumours are pretty strong that I'm about to get a local club in League2 Ontario, so they'll end up taking over the #1 spot in my support & knocking the other teams down a spot.
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I realize Canadian soccer is going to be exceptionally niche here, so I'll give a quick layout for the majority of people who are completely unfamiliar.
For men's soccer:
The top of the USA "Pyramid" is Major League Soccer, which has 3 franchises in Canada.
The Canadian "Pyramid" has the Canadian Premier League as our 1st division, and no 2nd division (plans are for CanPL to split at 16-teams). Our 3rd division is a series of separate leagues under the League1 Canada label (Ligue1 Quebec, League1 Atlantic, League1 Alberta, League1 BC, League1 Ontario). Starting in 2024, League1 Ontario is splitting into 3 leagues (L1O Premier, L1O Championship, and L2O) with promotion & relegation. Below that are various youth/amateur leagues.
For women's soccer:
League1 Canada has women's teams as well. They also occupy the 3rd division position.
A pro-division (Project 8) is currently being developed for a 2025 launch.
How our national women's team has remained so competitive, is something of a mystery.