Doppelbock is not a hoppy beer at all. I would suggest Pilsner as a hoppy lager, or if that is too light in color then perhaps an overly hopped amber Marzen would be good too (a lot of commercial breweries are doing those every September).
For any lagers, I recommend WLP833, Wyeast 2206, or S-189. Mash low about 148 F for best effect.
Darker yet, you could also try a Sticke Altbier which is a strong dark bitter cold-conditioned ale. For that style, nothing beats Wyeast 1007.
And these recommendations only matter if you care about sticking with traditional styles. If you don’t care so much about style, then there are no limitations at all. My yeast recommendations still stand, those are all solid yeasts. But you can hop up any style you want, or change the color, or whatever. It’s your beer. Brew what you enjoy.
Cheers.