Whatever you eventually get, bookshelf or tower speakers, try placing them away from the wall, at least 50cm, preferably more. I know it's always such a thing with placement and space constraints. If they absolutely must be closer to the wall, choose speakers with a gradual bass rolloff, so the added bass from the wall doesn't get too much.
Generally, I can see big tower speakers working just fine there, as long as they have the right characteristics in the lower bass. Like this for example:
View attachment 421902
From this Audioholics review, some 1100€ the pair
Well suited for placement near the wall, which will reinforce the region below 50-80Hz or so, depending on distance. With proper placement you'll get nice, even response down to 30-35 Hz. That's subwoofer category already, and pretty much the best you can expect from very affordable speakers.
The smaller Aurora 700 model (2x6.5" woofers instead of 2x8") are also something I can recommend. Around 700€ the pair, slightly less deep bass, but also unproblematic with placement and generally really nice, well balanced speakers for the price.