Squaresoft from 1993 to 2001 off the top of my head:
Final Fantasy VI
Final Fantasy VII
Final Fantasy VIII
Final Fantasy IX
Final Fantasy Tactics
Final Fantasy X
Xenogears
Secret of Mana
Vagrant Story
Front Mission 3
Chrono Trigger
Legend of Mana
Secret of Evermore
Parasite Eve
Parasite Eve 2
I can't think of a better stretch of releases in gaming history than 90s and early 2000s Squaresoft.
If we're going for the most consistency for the longest duration of time, then the answer is probably Capcom. Square has a denser run of very high quality titles for the time that it lasted.
Since 2017, Capcom has done very well with smart moves, improving their engine while expanding their staff count and IPs. They've made this gen for me.