I agree with that list, we came up with the exact same list apart from me listing Sittichai and you listing Petrosyan, only because I was focusing on fighters who are active now and Petro isn't too active these days. But I'd definitely agree with Petro replacing Sittichai in that list too.
Again, remember that I made that list because you asked and I based it on results and achievements, not by who I prefer watching. I wouldn't have considered RvR in the list for example but he's beaten solid competition several times and been champion in 2 stacked divisions, he does deserve being in the list.
Rico's weight class might not be the most talent stacked but it's still a dangerous division where blows have much more impact and he's been very dominant. You can't just try to imagine what he'd be like at 70kg, that just wouldn't be Rico and it's completely imaginary.
Yod and Superbon are very good, I'm actually looking forward to seeing Superbon's next fights, but they haven't achieved enough in KB yet to be in the top5 P4P list IMO.
Considering Rossmalen's height he's actually better suited for 145 rather than 155. I don't see what's wrong with trying to conquer another division after dominating the 155 division until he pretty much lost 2 times to the current 155 champion Sittichai. Also if he doesn't need to fight outside of Glory, I don't see why that's an issue.
In any case, most people who replied to your posts including myself have listed several Dutch guys in their Top5 P4P list. Just saying.