FL for merino is hard to beat. I dont much care for any of their outer garments or synthetics that I’ve tried. I have had extremely good luck with Sitka in this category, but since it isnt on your list I would try one of the other companies on your list besides FL.
Like others have said, don’t get hung up with just one brand. I have tried quite a few base layers and think FL’s merino was the most comfortable and performed best. I like sitka for outer layers and their jackets are tougher than FLs in my experience. Canis is also making real quality products worth taking a look at, their chamois fleece hoodie is one of my favorite items of clothing. I haven’t tried Pnuma but I’ve heard good things.
All the brands you mentioned are solid, just gotta find what fits you best and suits your style of hunting.