Being long and narrow, a false screen wall with an AT screen looks like it would work nicely. If you have DIY skills you can make a DIY screen frame and cover it with Spandex (go to the "DIY screen section" of the Screen forum and let Mississippi Man explain how it's done) or with a SeymourAV screen material. You could also buy pre-built AT screens from Seymour, Silver Ticket, and a host of others.
For more info on the false screen wall, look up the "Minimalist Screen Wall" thread and see how others have done it. The "goalpost" method seems very popular. I did did that and build velvet wrapped panels to go above, below, and to the sides of my screen.
7.4.4 Theater Room: JVC-RS500, Silver Ticket AT 2.35:1 142”, Onkyo RZ830, Anthem PVA-7, Panasonic UB420, Apple TV 4K, JBL Studio 530’s, Dual Driver VBSS
3.1 Living Room: Samsung 64” F8500 Plasma, Anthem MRX 300, Dynaudio Audience 52’s, Dynaudio Audience 122C, NHT SubOne, Roku Express (2019)