My highest level ship is at this point Kitakami at level 97 (20-something thousand xp to go to 98), closely followed by I-168 and Ooi, both also at 97. As for torpedo cruisers, there isn’t really a race: even number three, Kiso is in the latter stages of level 96 at this point.
The field of subs is more spread out, Imuya having a two-level lead ahead of I-19, currently at 95, the rest following in the mid-80’s with the latecomer I-8 quickly catching up. She’s currently 66.