The bucktail and marabou are great suggestions, add to that a grizzly cape with good long feathers (not the dry fly type) and you can tie flies that will catch fish anywhere. Just like anything involved with fishing it gets to be addicting, you wind up with way more materials than you need. Try some arctic fox or finnish racoon for some jigs and flies with great action, they both build up a little bigger than marabou.
As for flies the suggestions have been good so far, I would add bendbacks to your list, great fish imitator and one of the more weedless flies you can tie.
As for the senko, ez body probably wouldn't work. Check out the gulley worm, essentially woven chenile. Might work for you.