To be fair, you can't say the Swansea and Mumbles turned up, they were there first, by a good margin. The others 'turned up', the GW originally in the form of the South Wales. You may as well give Powlesland and Mason the benefit of the doubt and include them as well. Oh, yeah, and if we're counting the South Wales we need to include the Vale of Neath, which had a pub named after it!
The L&NWR lines were originally built by the Llanelly Dock and Railway Company, parts of which ended up with the GWR and part with the L&NWR.