I so regret not eating more donairs when I lived in [Redacted], NS for a bit a few years ago. They definitely exist all over the place in Alberta, but haven't tried one any of the times I've visited. I have never seen it in Ontario, but I also haven't actually lived there since the early 2000s.
As for actual sauces... I've been mixing more things myself lately, even if I'm not always succeeding. In any case, I have fewer things like salad dressings and salsas and more component parts like every vinegar and oil that exists. Also fish sauce, multiple varieties of soy sauce, lemons/limes (or at least juice), garlic, tons of spices (too many spices), tomatoes, onions, peppers. I've been out of ketchup for months and haven't cared. I don't usually like ketchup or bbq sauce (also, American ketchup is weird) or anything else that's sweet. I use a TON of yellow mustard, though. I'll eat spoonfuls of mustard. Checking my fridge now, I've also got sambal oelek, sriracha, various other hot sauce (I'm not loyal to any one hot sauce at all), mayo (Best Foods AKA Hellamann's), sour cream, KIMCHI (local store started selling it, and I've been too lazy lately to make my own lately so I am SO HAPPY--also I wouldn't really call anything I'll sit and eat half a jar of a condiment, but it was mentioned above), gochujang, hoisin, two kinds of harissa, Worcestershire sauce (mainly for chili and Caesars), and dill relish (I use this ONLY for tuna salad). I prefer things that are spicy/pungent/vinegary/sour.
I've randomly been craving Swiss Chalet sauce lately, I actually didn't notice it was already mentioned above until just scrolling back now. Swiss Chalet being a chicken restaurant in Canada that has absolutely nothing to do with anything Swiss. If anyone in Canada wants to pick me up a few packets, I will pay you. I'm pretty sure it's from a powder in the restaurant as well. It's garbage, but I miss it. One of the last times I was in Canada, first thing we did was go to Swiss Chalet. Got me a quarter chicken dinner with poutine and a Caesar. Drowned everything in that sauce.
Reminded by this thread that I wanted to pick up some HP sauce. I think they've got it at World Market. I very much prefer it to A1, and definitely more than anything that's just labelled bbq sauce. While I'm there, I still haven't ever had Vegemite or Marmite, and I've been meaning to. I know they have at least one of those.