Onyxcrowle,
Did you actually do ANY research into your list or did you simply just look at a map and think 'Id like an airline to serve there, there and there'?
Firstly, Norwegian:
Could they do lpl -cph-dsa-cph-lpl
No because LPL is not a base. Flights would be from CPH and not part of a LPL W pattern as you have suggested.
Stavanger to DSA? Is there a market? Probably not (unless the Doncaster rovers matches are actually full of Scandinavians?)
Secondly, easyjet:
Tel Aviv try tempt them from MAM
Im assuming you mean MAN? Do you know why they serve MAN-TLV? Its not just because 'they feel like it and have no-where better to use the aircraft', its because there is a market, and one that can currently support flights from MAN due to the large Jewish population that reside in the MAN area. Has Doncaster got a large Jewish Population? No. Has Sheffield? Not one large enough to support soon 3 weekly flights from easyjet.
Lastly, I appreciate you are using a phone or tablet or whatever, but please can you at least attempt to proof read your posts, they are very hard to understand, both due to layout and spelling.