I can help on a few. Definitely check the knife database as well. And please post your knives when done. This gives others like you (and me) hints on how to sharpen, and is a quick way to save our own data. I had to look now to check on one of the answers I gave below.
Swiss Army Voyager Lite – this looks like the standard blade on most “normal” size Swiss Army knives, where the main blade is about 3″ long. I have done 20 degrees on mine. Have not tried less.
SOG Seal Pup – I have a SOG Seal Pup Elite, I forget what the difference is, the Elite has AUS 8, which may be the difference. I did 20 per side. It looks good. I think this will be OK. Looks like the factory edge (sharpened it first time on the WE). was 22 to 25 deg. Since I sharpened it I have not taken it out for heavy use, but I think it will hold up at 20 degrees. I use this knife for bush crafting/hiking work.
Gerber Multi Tool – I have done some Gerber/Leathermans at 20 degrees per side. These were low end, and the steel type was not given. For mine 20 per side looked close to factory.
I have taken Benchmades in these steels (154cm, CPM M4, and S30V ) to 15 degrees and been very happy. I don’t have your exact Benchmade models. Even with 440C I think you can get away with 15 degrees per side. I use my Benchmades for EDC work, but I don’t beat on them like some folks do. When I batton I use a fixed blade. I am giving this advice based on the fact that BM makes high quality knifes and only uses top notch steel.
Welcome to forum and happy sharpening.