Don't overlook Synergy especially if you're 6'9"! While not explicitly designed for people of height, I've personally found the XXL "pro" short-sleeve full zip suit to fit extremely well and is incredibly comfortable in hot weather (example here: https://www.amazon.com/dp/B09C2T256B) but it might be a little awkward at first if you're not used to full-zip. I hike miles in them, in the mountains, so there you go.

5-6 years ago I would have said Pearl Izumi but their quality and fit have gone so far downhill in such a short time that they suck ass now.