I know it must be hard cos the low and wide tank style is really in, but I think this is a lovely proportioned tank, with it's own advantages. I think at the moment what isn't work is that the tank is tall, but your substrate is flat and close to the bottom, so you can't really take advantage of all that space, other than with tall plants like the balansae. It looks like you have some wood that goes halfway up, but I think to really make it look awesome you should be bold and do big, dramatic hardscape that goes at least halfway up the tank and provides different interest at different heights. Your plants look really healthy, so you don't have to worry about that! A really good example of this is the
<Spring Passage journal>, where they use dramatic large rocks to create height, but still leave a sliver of the whole back showing which is super dramatic.
Some more inspo:
You could also look at longer tanks and just.. take half the scape as inspo, like this one:
Or something like this:
Another option, which is potentially crazy and not at all what you want, but you never know... is that you lower the water level to 30-40cm, and then use the above water as a terrarium/paludarium. I totally get if that's too drastic, but these tanks are beautiful. This
<splash tetra paludarium> is a great example, and with a lid you could use really amazing high humidity plants. Can send more pics if you're into it.