Black Swan's porter is excellent, and their Wild Child is also quite nice, and could potentially help fill a huge gap in the market (not a lot of sours coming out of SW Ontario). I would love to see both of these become more widely distributed in the near future - perhaps as part of this newfangled LCBO growler program? Their IPA and EPA were both fine, too.
I've also enjoyed a lot of the stuff I've had from Block Three. 1up is a solid DIPA, and I also really enjoyed Kamikaze Monk (5.6% saison w/sorachi ace). Their flagship saison is alright, but not a favourite of mine. They've been experimenting with wine barrel-ageing too, though I haven't gotten around to cracking open either of the two bottles I picked up quite yet. One is a 10% Belgian-style pale ale, and the other was a saison aged with Brett in barrels from Stratus winery. Both sound pretty enticing.
Innocente is another one that comes to mind. Their Pils-Sinner German pils was one of the better Ontario-made examples of that style that I've tried, and Werk Avoidance (3.4%) was easily one of the more solid session ales that I sampled this summer (of which there were many). BA says I've tried 13 of their beers, and nearly all of them were products I'd consider purchasing again.
I've been to Royal City a few times; tried all four of their main lines and a handful of rotating offerings. The dry-hopped pale ale and Exhibition IPA (session ale) were both ok, but those are the only ones that come to mind. The "kombrewcha" that I tried back in the spring was neat I suppose, and all of their other offerings have been forgettable (though it's worth mentioning I didn't get to try the oud bruins).
I suppose if I had to pick a favourite, I'd vote for Block Three, but their saison is in the LCBO so maybe they don't count. Black Swan then?
Edit: Almost forgot Kilannan, though I suppose they aren't really a non-LCBO brewery either. I live outside of their distro area, but the next time I go camping up in the Bruce, I am going to pick up a mixed flat of their Kolsch and their Alt. Both are very nice, easy-drinking beers that would be ideal for the cottage/campground.