Help me pick a tank to go 1000 battles in

I’m an ok player, pretty solid yellow that on a good day can pose as a blue. I think my problem is I don’t particularly have a tank I can say I am an expert with. So I want to pick one as my primary and play it almost exclusively till I get 1000 battles. Then assess if I’m playing better or not. Here’s the list of tier 8-10 tanks I have to pick from. Which one do you think would be the best overall to get better as a player with.

Tier 10

Bat-chat 25t

T110E4

Object 140

IS-4

E 100

Kranvagn

Object 277

AMX 13 105

Object 277

Tier 8

Skoda T56

ShPTK-TVP 100

Progetto M35 mod. 46

Bat.-Châtillon Bourrasque

T26E5 Patriot

If none of these, which tank and why?