You are not going to find a single brand that both has all of those products, and whose products aren't crap. We also can't recommend anything without a budget. You can easily get into several thousand dollars with just audio or just a keyboard.
For headset, you're likely better off with a decent pair of headphones and a standalone mic. For keyboards, you'll likely have to get a custom, as all major gaming brands only sell absolute hot garbage (only a handful of products as exceptions). Mice, depends on what games you play. Mouse pad is just 100% personal preference. Headset stand, you'll have to decide what fits well with the rest of your setup. And with all of this, personal preference and usecase matters a ton. And we of course can't make any recommendations if we don't know either of those.