Dave Evans was nothing like Bert Jansch - he used different tunings for a start and had already evolved most of his style by 1963/4. If you ever get the chance ask Steve Tilston who knew him well and was influenced initially by him. Bert was a better songwriter, to be sure, and a totally different guitarist. As for comparisons with McColl - all subjective. To me when I hit London in 1965 as a young musician about to become a busker, McColl was some uncool bloke from a different era with a typically communist authoritarian way about him - clever in a narrow way but bossy. He wrote a semi decent pop song - Last Time etc but it took Roberta Flack to do it justice. Since then - my opinions haven't changed that much. Although the flame of 'folk', whatever that is in 2011, still burns occasionally. Just got back from a Magpie Lane gig at a local folk club in Leicestershire and they were superb.
Oh - saw Mark Newman back in the old days as well - good blues/ragtime stuff which mightily impressed us budding guitarists and he surfaced again sometime back.