Even without bringing up 'Winter Sonata' as an example, we're now in an unprecedented Korean Wave boom.
Literal
''Winter Sonata'' [object-を] example [locative-に] raise-[until-まで] not-exist, now [topic-は] unseasonable Korean-wave boom is.
A media/culture commentary. 『冬のソナタ』(Winter Sonata) was the 2003 Korean drama that launched the 韓流 (Korean Wave) boom in Japan. ~を例に挙げるまでもなく ('without even needing to cite as an example') is a set concessive phrase used to acknowledge something that's too obvious to need examples. 時ならぬ (ときならぬ) is a classical/literary expression meaning 'unseasonable, unusual for the time, unexpected' — here applied to a boom that came at an unlikely cultural moment.