This should give you the space height for a receiver. It's what I use for my 65" Sony on the tallest placement with a Klipsch r-52c center speaker with plenty of vertical space for a PS5 to sit on top of the center speaker horizontally if I wanted to. https://www.amazon.com/dp/B07M6114YM/ref=cm_sw_r_apan_i_dl_K34CDHVKRPJQS2WV2CQ6?_encoding=UTF8&psc=1
Amazon has stand/mount solutions that dont require a wall mount Rfiver Universal Swivel TV Stand Table Top TV Stand Base for 40 to 86 inch Flat Screen TVs, Height Adjustable Mount, Center TV Stand Replacement with Tempered Glass Base, Holds up to 132lbs https://www.amazon.com/dp/B07M6114YM/ref=cm_sw_r_cp_api_glt_fabc_KRVTQZYYFSK1WQM0RGWS
I have a 77 g1 on something similar. Also have a 65 cx. Im happy with the g1, no buyers remorse.
You can always go with a VESA stand, I was considering this one before deciding to wall mount.
Rfiver Universal Swivel TV Stand... https://www.amazon.com/dp/B07M6114YM?ref=ppx_pop_mob_ap_share
You can buy a vesa mount center stand for around $75USD. I bought this one last year for a 75" tv:
https://www.amazon.com/Rfiver-Universal-Adjustable-Management-UT5001/dp/B07M6114YM
Something like this