Xert is a hybrid polarized system that includes a variety of endurance workouts (below TP) that include both easy (LTPish) and harder (tempo/SS range).
Additional easy workouts At or below LTP include –
All the Small Things
Back to Blue
After Midnight
Everlong
Underclass Hero
Feeling This
The Strength to Go On (long one)
Like 
the ones you like 
and they’ll rise on recommended lists. Dislike others to exclude them.
You can copy workouts to create tweaked versions of your own (and like them).
Liked also means they’ll show up on the drag and drop list on the Planner.
Then there are o/u LTP entries like Lucy in the Sky and Save Yourself. May not technically qualify as Z2 but I like to do them anyway and they confirm my LTP number feels about right.
Rather than mix strain levels on a Z2 ride/workout I periodically toss in a sprint workout like Adventure of a Lifetime which can easily be replicated outdoors.
Otherwise consider “Boring, for lack of a better word, is good.” 
You can use intervals.icu to tabulate your activities based on traditional zones and they’ll be classified as polarized, pyramidal, etc. I used icu’s Totals page for that purpose during my 120 day indoor TED experiment. I rarely visit icu nowadays, but it helped me confirm Xert was what I was looking for. Now I rely on the Progression charts to track my season-to-season fitness. I’ve gotten even better year over year results since that experiment. The key is taking further control as you learn how to self-coach.