I like TD Ameritrade (now owned by Schwab, but still has their own web site) for its generally good execution (as far as I can tell), but mostly because it still has the best mobile (iPad) app that I use for the majority of my stock and options trading. Note that there are two apps: TD Ameritrade and thinkorswim (aka TOS). TOS is the one you want, and their desktop TOS app is also really good, but I actually find the iPad app to be more than sufficient for most of my trading.

They continue to work and improve it (which I'm relieved about, because Schwab's mobile app is awful, Webull is worse, and I don't know how anyone uses RobinHood for options trading, it's so hard to do cancel/replace orders with them, which I do constantly).