Your Requirements

II) Resale value is not important as I will drive it like for the next 10 or 12 years. (I rarely change car)

a. Camry - Good resale value
b. Accord - Good resale value
c. Teana - 2nd car dealer dont even wants it if u selling it after 3months of usage.
d. Subaru - worst than teana

III) Spare part easy to get (no need to wait months and months to order in) and will not cost me a bomb.
a. Camry - Available in massive & easily to find.
b. Accord - Available in massive & easily to find.
c. Teana - Available in massive & easily to find.
d. Subaru - Need to wait for import.

IV) Fuel consumption reasonable within class expectation.
All models are very similar. so no issue here.

V) Something that will not be too flashy to potential robber like a Beemer or a Merz.
Teana & legacy fits in here.

So based of above, Teana is your best choice.