Google reader
Any new reader I’ve tried fails to understand this. They go for complexity and glamour. They need a mode for just simple long list of headlines and not waste any screen space.
Edit: context
I didn’t know about The Old Reader and I will give it a try.
How is this (random screenshot found via image search) not basically the same as Google Reader?
http://kingofgng.com/media/20150116_inoreader.png
And that's not even the densest display option.