Had Lowas, Meindls, currently mincing about in HanWag , i would say Han Wag GTX Gore Tex top tabbing wellie , and will fit a NATO plank, they have a binding groove on back of soul, wish i had them 14 years ago (AMF)
Like all boots, it depends on your feet and the last the boot is designed around.
I went to the Altberg factory in Richmond, and got fitted for a pair. I was advised that I needed some modifications to the standard boot for the perfect fit. I paid the extra, waited the 8 weeks and was eventually sent a pair of boots that were a custom fit. Unfortunately the custom fit was for someone elses feet. They were shite, but I gave them enough time to break them in properly, by which time they were too worn to realistically send them back. I gave them away.
I bought Hanwags, they fitted perfectly straight out of the box, and are still going well several years of hard tabbing later.
I know loads of people that love Altbergs - I don't. To the OP - try a variety of boots as there is no "one size fits all" solution.