The only decent production full-size scout patterns, currently made in USA, seem to be made by Queen. The main blade is D2 steel. I believe the other tools are probably 420HC. Gorgeous bone. Fit and finish is a little hit or miss on these.
The secondary market has tons of great scout patterns. If you can find a mint Kabar 1152 on the secondary market, you can get an excellent Camillus-made scout in carbon steel with delrin scales.
Camillus also produced the Camillus 99 for many years, which is easily found on the secondary market. Some in carbon steel. Some in stainless (440a and 420hc). The carbon steel models generally have a longer screwdriver. The stainless have a shorter screwdriver.
The Remington R-4 (also Camillus made) had a great set of tools. Lots of them on the secondary market. 440a or 420Hc steel on these.
The Western 901 is also excellent. Some were made by Western. Some by Camillus after they acquired Western.
The Camillus C-4 is highly sought after. Great tools.
As previously mentioned, there is the AG Russell Premium Scout, made by Camillus. It's the gold standard of scouts. 154CM blade. Micarta scales. Camillus quality.
Not easily found is the Robeson scout, made by Queen with an ATS-34 main blade and bone scales. Rare as hen's teeth.
In the end, it's best to find a new Queen in D2, if you can find a dealer to hand pick you good one. If not, go to an auction site and find something above in NOS (new old stock) condition. Or go with something made overseas. Can't vouch for the quality of the blades on those.