So I finished cleaning the Gretsch, I tried it with the head I'm used to.
Emad on BD, Ambassador coated on snare and clear G1 on toms.
Pretty satisfied with the snare and the bass, but the toms are too bright, a lot of attack. I put a moon gel on each, and then they're too dead. I will try with pinstripes the drum came with.
The bass isn't as good as my Signia, a bit drier, but really great though. The snare is a killer : easy to dial in, nice harmonics, the toms, I really need to experiment, but I think coated G2 would be the right answer (I don't have in stock).
Oh and regarding heads - I used the Evans EC2 SSTs and they sounded amazing. Not dead at all. I have a video of youtube of just the tom / kick / snare that has something like 20k views and no dislikes haha - total freak of nature how good that combo sounded.