Modern Fan Tetris Sites:

• Jstris - (Browser only) (Keyboard only) Very customizable version, with a tetris 99-like battle royal. Can change SFX, skins, controls and theres a wide variety of game modes. Very quick to setup a game room and play with others. Least intensive on computer
• Tetr.io - (Browser/PC) (Keyboard/Joystick) Somewhat customizable, featuring a great matchmaking competitive 1v1 mode. Cleanest UI, although probably have to change some base settings when getting into it. Can't change skins or SFX, but social feature on it is great. Bit more intensive on computer but there's lots of options to optimize it.
• Nullpomino - (PC only) (Keyboard/Joystick) Very customizable, with a focus on array of gamemodes/arcade feel. Lots of options and runs smoothly on computer. Most likely you'll have to change a bit of base settings. Also a bit harder to understand than other clients, but has the wide array of options makes it fun to mess around with.
• Texmaster2009 - (PC Only) (Keyboard/Joystick?) TGM Arcade clone. Lots of TGM players appoint it as being the most accurate TGM clone. Controls are funky so you will have to adjust them. (Use this set to help set it up if you're interested: https://tgmguide.github.io/2020/05/02/setting-up-texmaster/)