Tettanger for sure. Saaz can be unpredictable and doesn’t keep as well as Tettnang. German tradition is also reliable.
Can't do it...some lagers are Helles or IPL and require a milder hop presence and flavor and some are Pils style that simply must have the spicy punch. Not to mention that most noble hops are low alpha and much larger quantities are required for bittering. For me it's the big 3...Magnum, Mittlefruh and Saaz.
Lager? More of an Ale guy here I hope nobody asks me to pick one hop for ales... Just kidding, what would that be a LAGASHMASH
Thats not a bad question there Craig hmmm id go Galaxy but ive never done bittering with it so id late addition it.