There are 3 separate artists listed on last.fm as Dave Ellis:

1) For more about the comedic sex rock of singer/songwriter Dave Ellis (discography 2009 and later, including Drama Per Orgasm), please visit www.DaveEllisMusic.com

2) For more about the jazz of tenor saxophonist Dave Ellis (discography 1996-2003), please visit www.davellis.com

3) A UK Folk Musician:
From Time Has Told Me (http://time-has-told-me.blogspot.com/2006/06/dave-ellis-album-uk-folk-1973-dave.html)
"Dave Ellis is an influential English folk guitarist, singer and composer whose music is extremely difficult to categorise, due to its unique diversity and combination of styles. His early instrumental influences include guitarist Bert Jansch.
Ellis' first vinyl album called "Album" (1973) won strong critical praise and is regarded as a classic, but the opportunity presented by acclaimed national TV and radio appearances (on such now-legendary TV shows as The Old Grey Whistle Test) was inexplicably never seized by his record company, at a time when the solo acoustic guitarist/singer-songwriter needed all the promotion they could get, no matter how good the material or performances.
As result of the lack of promotional follow-up at that time, Ellis's guitar prowess has remained one of the best kept secrets of the guitar fraternity, influencing such successful artists as Mark Knopfler." Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.