I honestly keep forgetting the Warhammer universe exists and there's a recent RTS entry. I've never heard of OTC or AotS, Civ is more 4X, I've actually heard of Stellaris but forgot about it. In my mind I thought of Master of Orion 2 to C&C4/SC2 as the end of the genre. Maybe throw in a mix of there being too many games out now and they're not all big name so that makes it seem like the genre is dead/dying.
For me, my interest in the RTS genre proceeded like this; MoO 2 > Starcraft 1 > Age of Empires 1/2 > Age of Mythology > C&C3 > C&C4 (vomits) > SC2. I'm sure I'm forgetting a few in the middle as there were tons of RTS' from 96-2004. I remember almost everyone playing WC3, but I was too into other games then.