hamfist
Fish Herder
heres a side view.
he will still have quite a bit of room but the bigger wood at the far end might cause him a bit of an obsicle to get round but it will give his tank mates place to escape if he gets angry....
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Hmm, that larger bit of wood literally takes up almost half the tank. It takes a LOT of swimming space away. Admittedly it is a really special piece of wood but, personally, I would remove it to give Keith swimming room. I think the other bits of wood will still give some sort of refuge to any tankmates who need to get away from him.
You could replace the large piece wood with some other much smaller rock/wood to at least still have some decor visually at that end of the tank.
The way you have it set up in your first photo would be absolutely stunning for smaller fish but I think it is too much of a compromise for a chunky 13" oscar.