I think 11 x 19 is too big. There is not enough room between the upright and the tire shoulder at the back. You could space it out but then you might rub the guard and would not be legal. If you put a stretched tyre on 11" like 265 or 275 it might work but this tyre is really too small for 11" so why not get 10". It is big enough.
I have 19 x 10 ET21 on the back with Cont SP6 275/30 and there was little or no clearance on the upright requiring some modification.
I think 19 x 9 with 265s would not be a problem.
On the front I have 19 x 9 ET14 with 265/30 and there is slight rubbing on heavy cornering but my car is a little lowered. I think maybe ET10 and it would not rub but I need to check what it is rubbing on.
I have raised it ~5-10mm since these photos but there is still slight rubbing on the front but much improved.