Ideas for loyalist thousand sons kitbashes

Hey everyone. Me and my friend are doing something where we’re going to do almost like an alternate universe where the chaos legions stayed loyal and the legions who stayed loyal turned traitor. He chose the Luna Wolves and I chose the Thousand Sons since they’re one of my favorite legions. What ideas do you have for kitbashing some loyalist marines? I would use the TS miniatures but I feel like having my entire army be rubric marines and sorcerers would be a bit odd if I’m using the normal space marine rules and data sheets. What ideas do y’all have?