Bamboo Paper has about 10 simple templates, the usual suspects like lines, squares, and 2 check box types. Interesting detail: one and the same template is used throughout the whole notebook.
Noteshelf comes with 26 templates. Besides the music bar, you'll find a Guitar TAB page, todo's, even a workout schedule. Dayplanner, weekplanner. You can purchase more in their store. Every page in your book can have it's own template.
NotesPlus has about 15 that should cover most needs. Todo checklist, a few column types, dayplanner and weekplanner are all there. If I remember correctly, you can create your own - but I'd have to check. Every page in your book can have it's own template.
With a note taking app that imports pdf, you could create your own and import it. Bit of a workaround I admit.