Despite the occasional jibe from British viewers about American TV, in fact their drama series are - generally - exceptionally well made.
They often have a common thread, with interwoven plot lines, and in many series a fast pace.
Far too many to think of them all, but on the medical side, there'd be House, ER, Scrubs, St Elsewhere, Chicago Med, Grey's Anatomy, and perhaps MASH (scores as a comedy too!).
And for legal ones, The Good Wife (spawned Good Doctor too), LA Law, Boston Legal, and the umpteen assorted Law & Order shows. They of course had a police procedural element, and for cop shows, well, I can still recall the theme tune from the wonderful Hill Street Blues, and the excellent NYPD Blue was another great show.
We do have our homegrown Casualty and The Bill though (& I'm old enough to remember Emergency Ward 10 & Dixon of Dock Green . . .).