Raleigh Royal has done everything I have needed. Racks front and back and carries a lot and I can tow a trailer when allotmenting. Never had an issue with it.
I'd second the comments about the Raleigh Royal. I have a 1985 one that I don't use for touring at all, so I run it without mudguards or a rack. It's an excellent quality frame, relatively light as it's mostly made of Reynolds 531, and rides very nicely. They were the equivalent of about £1,000 in today's money when new, so not cheap machines.
Other options are flat bar hybrids with wide range gearing, that have suitable frames that can take racks and mudguards. If we are talking about steel framed Raleighs there is plenty of choice, some very common bikes, some a bit more unusual.
The common one is the ubiquitous Pioneer made in various specs at different price points. This one is a a high spec Trail model from 1995 with a Reynolds 501 frame. Although not specifically marketed as tourers, they have stable geometry and long chainstays so are very suited to carrying touring loads.
A much rarer machine, but well worth buying if you can find one at the right price, is a Gemini 18 hybrid, with a Reynolds 531 frame and some very decent quality mechanical parts. These were the predecessors of the Pioneers and were only made from 1988 to 1989/90, so there are not loads around but they are lighter than a top spec Pioneer and the frames are touring geometry and comfortable to ride. This one dates from 1988.
Finally you could of course use a suitable rigid MTB frame as a base, and the 26" wheels might be an advantage on a smaller size bike because they cause less geometry compromises, but an MTB will be a couple of pounds heavier than a dedicated Tourer or Hybrid due to the frame & forks and wheels being more robust. Avoid anything without rack & guard mounting points. There are plenty of frames around that do have the necessary mounts, especially if you stick to the late 80's/early 90's era. There is no need to mess about trying to bodge up DIY mounting solutions if you use the right frame.