Sauer was a composer, it was mostly salon music from what I can tell, but it's very good; If I ever have lots of spare time on my hands and have learned and performed all the "important" pieces I care about I would like to learn his "Concert Polka" and "Aspenlaube". His complete recordings were put out by Hyperion, I think, and are already out of print(***! I missed it..)

. He also edited Liszt's music, the Dover editions of Liszt that many of us use are reprints of these editions(not Annees de Pelerinage, that's Soviet, or at least mine is: Dover was reprinting quite a few Soviet editions about 8 years ago, but there's been legal trouble or something, don't know the specifics; does anyone? Inquiring mind would like to know...

)
You might also be thinking of Eugen d'Albert, who wrote many operas including "Tiefland" and "Die Toten Augen", which are still done very occasionally; he made quite a few recordings, of Liszt and Brahms and Chopin and his own music as well; his recording of Liszt's "Au bord d'une source" is stunning, I think, even though he has a lapse and improvises the ending; or maybe he ran out out of time, it was the olden days.
There is detailed (though often opinionated)information about both these cats in Harold C. Schonberg's "The Great Pianists" , still the best book on the subject.