It’s a bit of a nebulous question. In fact there wasn’t just one single “renaissance” like we talk about now, but a succession of renaissances... the Italian Renaissance, the German Renaissance, the French Renaissance, etc. The Italian was the earliest, while the German, which Gutenberg was a part of, was later.
I’d still say Dante is technically “pre-renaissance” even for Italy, but he is right on the dividing line and should rightfully be seen as a key precursor to the renaissance, kind of like a guitarist like T-Bone Walker is a key figure in rock ‘n roll music even though he never actually played rock ‘n roll, and belonged to an era that preceded it.
I like your T-Bone analogy.