No competition for me, it's clearly "These Days". Their masterpiece. Their climax and peak. An musical orgasm of roughly 75 minutes. Every note in its own place. I would be a fan of this band if they never recorded this album (as I had already been a fan when it came out), but it is the one that justifies my fan-being the most...
Imo, until 1995 the band got better with each album, so my ranking would be
1. These Days
2. KTF
3. NJ
4. SWW
5. 7800
6. BJ
But KTF and NJ are also perfect albums for what they are, SWW is great but falls a bit flat compared to the top 3. I just like TD the most.