These are a variety of ES themes made for 16x9 monitors. Usually themes in this category are the themes that have been released to the official retropie theme installer.
https://github.com/RetroHursty69/es-theme-blueprism
https://github.com/RetroHursty69/es-theme-bluesmooth
https://github.com/RetroHursty69/es-theme-boxalloyblue
https://github.com/RetroHursty69/es-theme-boxalloyred
https://github.com/RetroHursty69/es-theme-boxcity
https://github.com/RetroHursty69/es-theme-cabsnazzy
https://github.com/RetroHursty69/es-theme-CapcomColorHorizontal
https://github.com/RetroHursty69/es-theme-CapcomColorSpin
https://github.com/RetroHursty69/es-theme-CapcomColorVertical
https://github.com/RetroHursty69/es-theme-Card_Decky_16x9
https://github.com/RetroHursty69/es-theme-circuit
https://github.com/RetroHursty69/es-theme-comiccrazy
https://github.com/RetroHursty69/es-theme-corg
https://github.com/RetroHursty69/es-theme-crisp
https://github.com/RetroHursty69/es-theme-crisp_light
https://github.com/RetroHursty69/es-theme-CRTBlast
https://github.com/RetroHursty69/es-theme-CRTCabBlast
https://github.com/RetroHursty69/es-theme-CRTNeonBlast
https://github.com/RetroHursty69/es-theme-cyber
https://github.com/RetroHursty69/es-theme-darkswitch
https://github.com/RetroHursty69/es-theme-deflection_purple
https://github.com/RetroHursty69/es-theme-deflection_grey
https://github.com/RetroHursty69/es-theme-disenchantment
https://github.com/RetroHursty69/es-theme-donkeykonkey
https://github.com/RetroHursty69/es-theme-dragonballz
https://github.com/RetroHursty69/es-theme-evilresident
https://github.com/RetroHursty69/es-theme-floyd
https://github.com/RetroHursty69/es-theme-floyd_arcade
https://github.com/RetroHursty69/es-theme-floyd_room
https://github.com/RetroHursty69/es-theme-garfieldism
https://github.com/RetroHursty69/es-theme-gametime
https://github.com/RetroHursty69/es-theme-ghostbusters
https://github.com/RetroHursty69/es-theme-graffiti
https://github.com/RetroHursty69/es-theme-greenilicious
https://github.com/RetroHursty69/es-theme-halloweenspecial
https://github.com/RetroHursty69/es-theme-heman
https://github.com/RetroHursty69/es-theme-heychromey
https://github.com/RetroHursty69/es-theme-homerism
https://github.com/RetroHursty69/es-theme-hurstyspin
https://github.com/RetroHursty69/es-theme-incredibles
https://github.com/RetroHursty69/es-theme-infinity
https://github.com/RetroHursty69/es-theme-joysticks
https://github.com/RetroHursty69/es-theme-magazinemadness
https://github.com/RetroHursty69/es-theme-marco
https://github.com/RetroHursty69/es-theme-mariobrosiii
https://github.com/RetroHursty69/es-theme-mario_melee
https://github.com/RetroHursty69/es-theme-merryxmas
https://github.com/RetroHursty69/es-theme-meshy
https://github.com/RetroHursty69/es-theme-minecraft
https://github.com/RetroHursty69/es-theme-minions
https://github.com/RetroHursty69/es-theme-mysticorb
https://github.com/RetroHursty69/es-theme-NegativeColor
https://github.com/RetroHursty69/es-theme-NegativeSepia
https://github.com/RetroHursty69/es-theme-neogeo_only
https://github.com/RetroHursty69/es-theme-orbpilot
https://github.com/RetroHursty69/es-theme-pacman
https://github.com/RetroHursty69/es-theme-pitube
https://github.com/RetroHursty69/es-theme-primo
https://github.com/RetroHursty69/es-theme-primo_light
https://github.com/RetroHursty69/es-theme-realghostbusters
https://github.com/RetroHursty69/es-theme-retroboy
https://github.com/RetroHursty69/es-theme-retroboy2
https://github.com/RetroHursty69/es-theme-retrogamenews
https://github.com/RetroHursty69/es-theme-snapback
https://github.com/RetroHursty69/es-theme-snazzy
https://github.com/RetroHursty69/es-theme-spaceinvaders
https://github.com/RetroHursty69/es-theme-stirling
https://github.com/RetroHursty69/es-theme-stirlingness
https://github.com/RetroHursty69/es-theme-sublime
https://github.com/RetroHursty69/es-theme-supersweet
https://github.com/RetroHursty69/es-theme-swatch
https://github.com/RetroHursty69/es-theme-sweet_tinkerboard
https://github.com/RetroHursty69/es-theme-sweeter_tinkerboard
https://github.com/RetroHursty69/es-theme-tmnt
https://github.com/RetroHursty69/es-theme-tributeGoT
https://github.com/RetroHursty69/es-theme-tributeSTrek
https://github.com/RetroHursty69/es-theme-tributeSWars
https://github.com/RetroHursty69/es-theme-uniflyered