The Lone Ranger (apparently both in its TV and radio incarnations) apparently used a lot of classical music aside from the Rossini, not all of them well known pieces. For instance, I found a TalkClassical thread where someone asked to identify the music in this clip. It ended up being a fast tempo version of Joseph Hellmesberger's "Storm Scene (Gewitterszene)" - not sure about its status in the 1950s, but that's quite an obscure piece these days. I don't think a complete lists exists in official credits, as the pieces were chosen because they were considered public domain compositions. Someone's put together a book with all the references he could find though.