I'm going through a similar dilemma (kids are growing up and starting to complain more and more about lack of space). My biggest must-have is RWD which limits options a lot.
My contenders (more or less in order) are:
- Alfa Romeo Giuliua (non QV)
- BMW 3 series (F30 LCI (2015-2019) or G20, probably 330i)
- Cadillac CT4-V (non Blackwing)
- Genesis G70
Most of your list is fairly boring, which is fine, but you did ask about "fun to drive", and the closest utility Twin-equivalent I can think of are RWD "sport sedans". FWD/AWD for me would be a complete buzzkill (and I would rather buy a separate daily and leave my BRZ).
Another consideration - do you track your 86? If you throw tracking into the mix it gets even harder as most non-performance variants (not the QV, M, Blackwing, etc.) just don't lend themselves well to track work (no way to turn off nannies, not enough alignment adjustability, lack of brake options (or having to go BBK even for light track duty)).