I wouldn’t be too put off by the idea of bamboo. The impact is pretty instant and its great for that exotic feel and sound. Maybe in a nice big glazed pot if you’re worried or can’t do the groundwork to keep it otherwise contained. I’ve got several varieties in huge pots, with the advantage that they can be moved around when you feel like a change (and have the energy to shift the weight of the pots).
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Otherwise, maybe some type of miscanthus or a pampas grass.