Becher-Bräu Josefi Bock is a hearty dark contemplative brew of 8.2%, full or rich malt and a hint of dark chocolate. It's dry for its strength and the finish is bittersweet.
Ott Bock is a fine example of a Hellerbock with a rich malty palate and long dryish bitter finish.
Grasser in Huppendorf is one of Franconia's greatest. Their Josefibock is one reason, perhaps my favorite of all Hellerbocks.