Real Estate, The War on Drugs, Big Thief. Though I am not a variant completionist. That's a whole other level of collecting. Outside of that, I'd like to grab all the studio albums of Lou Reed, Bowie, Dylan and the Stones. Probably half way there with each.
I'm a U2 & Kacey Musgraves completionist. Variants too. Anything they've released on vinyl. Good thing that in Kacey's case that it isn't a ton...I also feel like I'm becoming a Robert Earl Keen completionist.