Listening relatively near field (irrespective of speaker size) can be the best way of minimising room effects- but inevitably means that the ‘sweet spot’ is small, simply because the equilateral triangle is smaller.if the best listening spot is about 38% from the front wall, the next best may be about that distance from the rear wall, meaning the speakers further apart if kept the same distance from the front wall, and a wider sweet spot.
I don’t know if there is anything of use in this thread:
https://community.naimaudio.com/t/speaker-placement-guide/12721