Pro-Kremlin is the info pushed by the Kremlin state channels, "propagandists" in this case are the people echoing that info, they are fairly easy to spot mostly because they use very different vocabulary (constant talk of "denazification", liberation, biolabls, pinzers, etc) and they tend to move from theme to theme in unison.
I'm not sure what's the point of arguing semantics, call them "people with opinions similar to that of the russian state TV channels". My usage of the word was more along the lines of "historically, propaganda has been a neutral descriptive term of any material that promotes certain opinions or ideologies".
You keep moving the goals. Did you decide their opinions are “similar to that of the Russian state tv channels”? When tagging some channels, but not others, together as "propagandists"/"people with similar views"/"Group A"/whatever, was that tagging your "original research", or was it based on some objective criteria?