Ah yes, the RTS genre, one of my favorites. Even more interesting that you seem to be looking for ones that are in 3D (where you can also move and rotate the camera to some extent). Those types of RTSes are a bit more difficult to find. Anyway, just going 'generally-speaking' with the genre itself I can list a couple (some won't fall in your specific category like C&C Generals would, however).
Very recent (or relatively recent) ones I heard good things about but never played myself yet:
- They Are Billions
- Homeworld: Deserts of Kharak
- Ashes of the Singularity
- 8-bit Armies
- Infested Planet
Ones that I know received 'mixed' reviews and seem to fall in the "hate it or love it" category (and never played myself):
- Grey Goo
- Planetary Annihilation / Titans
Ones I considered "okay"'ish, could have been (much) better but not exactly garbage per se (although I stopped playing them long ago):
- Age of Empires 3
- Empire Earth 2
- Ground Control (never "hated" it, want to make it clear; but never thought of it as being as good as a lot of people made it out to be, and I never played the sequel)
- Dark Reign (similar to the above, also never played the sequel)
Ones that I know were good (well, obviously in my opinion), or "decent", albeit some being old(er):
- Act of War
- Universe at War: Earth Assault
- Star Wars: Empire at War
- Company of Heroes (first one)
- Supreme Commander / Forged Alliance (first one)
- World in Conflict
- Warhammer 40K: Dawn of War 2
- StarCraft 1 (HD remaster)
- StarCraft 2
- Command & Conquer 3 (particularly liked, and preferred it with the Kane's Wrath expansion)
- Red Alert 3 (absolutely not as bad as some people made it out to be at the time, up to this day; it's a solid game even though I did prefer RA2 vanilla)
- Halo Wars (the 'Definitive Edition' on Steam specifically, never played it elsewhere)
Ones that I consider among the best RTSes out there, regardless of their age or them being 3D or not:
- The Lord of the Rings: The Battle for Middle-Earth
- Command & Conquer 2 a.k.a Tiberian Sun (nostalgia helps a lot for that one, I still enjoy it enough to play it but it is much slower-paced than I'd like it to be nowadays)
- Total Annihilation
- Star Wars: Galactic Battlegrounds (I can only wish one day it'll receive an HD remaster like Age of Empires 2 recently got)
And the God Tier ones (definitely affected by nostalgia, to be taken with a pretty heavy grain of salt for most I guess, even though I genuinely think they are that good to this day):
- Warhammer 40K: Dawn of War - Dark Crusade
- Red Alert 1 (all versions; but my favorite has always been Retaliation, at the time played on my PS1).
- Red Alert 2 (specifically vanilla, I didn't really like the Yuri's Revenge expansion much)
- Command & Conquer 1
- Age of Empires 2
- Age of Mythologies
- Rise of Nations
- Warzone 2100 (Nostalgia Level 9000 Mode Engaged)
- WarCraft 3
Wasn't necessary to do this list on my part but I like this subject so meh, why not.
Anyway, to come back to your main question OP, I do think that at the moment Homeworld: Deserts of Kharak is probably one (recent) game that might at least touch the style of game that C&C Generals was (but obviously won't be identical in playstyle I'd assume).