Death Thy Lover/House of Doom EPs - some really great songs! Death Thy Lover rules, Sleeping Giant is amazing, House of Doom also good. I don't think I love Mats Levin's voice with this band, though. He's good, but I'm undecided. His voice also feels like it's mixed rather low, which is a shame.
The Door to Doom - This album also rules. The return of Johan Längqvist is incredibly strong. First three tracks are amazing, the House of Doom remake is great, Black Trinity is cool...overall it's just a really good fucking metal album. I'm certainly no massive fanboy, but I feel like this would be a good final album. They even got Iommi to guest on a track about a killer Octopus, which feels like the pinnacle of their career and such a perfectly hilarious coda that I think they should just hang it up.
My overall thoughts on Candlemass...I've really enjoyed listening to them and I'll probably throw on a few albums every autumn for some good, doomy fun. I'm pretty positive that the two albums I'll listen to the most will be the first and the last (Epicus Doomicus Metallicus and Door to Doom). I think Längqvist is simply the best vocalist for this band. The most technically talented? Nah. But he just fits. The Messiah Marcolin albums are next up, especially the 2005 s/t and Nightfall, with maybe a nod to the other two 80s albums (but I doubt it). I'd honestly probably rank them the same as the Lowe albums (especially Death Magic Doom and Psalms). I doubt I'll ever touch the 90s albums again.
I'm glad I listened to them, I enjoyed mostly everything. They're not inventive or diverse enough to ever become a favorite, but Candlemass gets a solid horns up in my book.