Bands whose most iconic record is their first one, but which is also stylistically an outlier in their catalog

A lot of shoegaze/proto-shoegaze bands could go here (some, like Ride and JAMC, have been listed already).

Plenty of second wave techno too, e.g. LFO.

blood sweat & tears, obv.

There's a thread of albums that are 20 years old, and I've seen a bunch of recognition for stuff that is turning 30.

But we all seem to have agreed to let 2017 go by without acknowledging that Velvet Underground & Nico turned 50.