Turners and carvers might be interested as you surmise. The pieces are too short and small in diameter to be of any real interest to furniture makers or joiners: and I suspect much of what's pictured might be branches, and if that's the case it is going to be full of reaction wood and therefore unstable, making it even less interesting for the furniture maker or joiner.
Apart from turners and carvers, who can quite often find something interesting to win out of such wood, I think what you've got is probably best used as firewood. You're unlikely to get much of a price for what you have there, possibly about the same as you might pay for firewood, and I would expend little to no energy trying to find a buyer - but if you know a carver or turner or two nearby that might be interested, you could give them a call.
Incidentally, even dead trees remain remarkably wet whilst still standing, and it wouldn't surprise me to find out those logs are somewhere between 50% and 70% moisture content. Another clue to their likely current wetness are the lack of radial shakes visible, and these shakes develop quite rapidly in oak if left to dry in the round. Slainte.
