Chair: AmazonBasics High-Back, Leather Executive, Swivel, Adjustable Office Desk Chair with Casters, Black https://www.amazon.com/dp/B00XBC3BF0/ref=cm_sw_r_cp_api_i_mMoHFbS91Z3M3

Mounts: Loutytuo Universal Monitor Pole Mount Bracket Without Punching Fully Adjustable Stand for Diameter Pole Mount with VESA 75/100, Fits Screen up to 27 inch https://www.amazon.com/dp/B07R7SC4B8/ref=cm_sw_r_cp_api_i_OcoHFbK7Y3J5F

What do u think of these:

https://www.amazon.com/gp/aw/d/B01ICHJIM8/ref=zg_mw_12900741_18

https://www.amazon.com/gp/aw/d/B00XBC3BF0/ref=zg_bs_12900741_1

Both highly rated and much cheaper. User feedback looks good, it's what I'd go for

Chair: AmazonBasics High-Back, Leather Executive, Swivel, Adjustable Office Desk Chair with Casters, Black https://www.amazon.com/dp/B00XBC3BF0/ref=cm_sw_r_cp_api_i_5boHFb9ZVXRZ5

Mounts: Loutytuo Universal Monitor Pole Mount Bracket Without Punching Fully Adjustable Stand for Diameter Pole Mount with VESA 75/100, Fits Screen up to 27 inch https://www.amazon.com/dp/B07R7SC4B8/ref=cm_sw_r_cp_api_i_OcoHFbK7Y3J5F

Depends what you want/need but this one was been great for me under $200.

AmazonBasics High-Back, Leather Executive, Swivel, Adjustable Office Desk Chair with Casters, Black

https://www.amazon.com/dp/B00XBC3BF0/ref=cm_sw_r_cp_api_i_N3WYEb51W2HYJ

EDIT: Avoid gamer chairs. Shitty quality that looks cool but doesn’t last