Although there's not one single Remington product I'd put at the top of the list for handguns, rifles or shotguns these days -- the variety and breadth of its line-up (okay, and I'm counting Marlin and Bushmaster too) has to put them at the top, in spite of the fact the company doesn't produce a modern revolver.
Ruger's made strides, but, alas, no shotgun, so even though it beats Big Green in the handgun category handily, they're still second-place.
Beretta (yeah, its subsidiary's cowboy revolvers notwithstanding) and FN trailing behind ...
I'm a huge Colt fanboy, but until we see some more new production revolvers, and with nothing beyond MSRs, they're not close to being in the game yet.
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Some posters took their opportunity to bash HK when the OP asked for opinions of the best gun companies. I guess haters gonna hate. Can't help but wonder if some haters have ever owned what they hate?
However, FOR ME, HK offers an awesome line-up of weapons and all that are offered are quality weapons. It should be repeated: HK Customer Service is second to none. There are many great companies and HK is at the top of the pile. Sometimes diluting a brand with many offerings in order to satisfy everybody can dilute the quality of the brand.
Yeah, but those those of us who worked for employers that issued HK products and had to deal with the company's "customer service," well, we know better ... Won't deny, quality weapons, though they'll cost you more, typically 35-40 per cent, more expensive than comparable platforms from competing brands.