CDPR is probably the flagship studio in Europe. Interestingly, they are probably the modern studio that most resembles Bioware in the 2000's.
Not really sure if they're comparable to a Bioware since CD Projekt Red the studio is basically the one and the same as CD Projekt the publisher. They also own GOG.com. They're probably more comparable to a Valve, with game development, game publishing and game distribution under a single roof.
Warhorse studios as well. Rebel Wolves. Machine Games. IO interactive.
The list is rather long.
Unfortunately CDPR is showing some signs of Bioware-ing. As much as I liked Cyberpunk 2077, it was visibly "less than" Witcher 3 in too many ways. This is a sign of decline.