Bookshelf speakers are visually smaller but the facts are that with appropriate stands, the footprint is similar. With that disclaimer, a good pair of monitors, depending on your placement options, can be easier to integrate with your room. If you are a bass nut, you could supplement with a sub, enabling you to integrate the sub into the room properly and blending with the monitors. I think we've all experienced speaker placement issues where the soundstage and bass response were not in the same place....
To answer your original query, some awesome monitors in no particular order, all of which have a healthy bass response:
Dynaudio C1
Focal JMLabs Diablo
Wilson Audio Duettes (disclaimer, I own these)
Vienna the Kiss
There are others....go to a shop and listen.
Good luck