I have owned FB1, extensively auditioned OB1, and now own IB2.
I have auditioned some speakers from Paradigm and Dali lineup.
Considering that I speak from my preferences perspective, simply put I do not like Paradigm, would consider Dali, with OB1 being the top choice from your list.
OB1 does not have tremendous bass despite TL design and advertised specs, after all the size of LF driver is determining factor.
I do not believe OB1 would be capable of filling up large room, thus the likelihood of overpowering your room is low.
And as always, auditioning is the best approach.
I have auditioned some speakers from Paradigm and Dali lineup.
Considering that I speak from my preferences perspective, simply put I do not like Paradigm, would consider Dali, with OB1 being the top choice from your list.
OB1 does not have tremendous bass despite TL design and advertised specs, after all the size of LF driver is determining factor.
I do not believe OB1 would be capable of filling up large room, thus the likelihood of overpowering your room is low.
And as always, auditioning is the best approach.