Agree, PS is very hard to keep happy inside. Not necessarily hard to keep alive, but I've never had a good looking one still by the time spring finally arrived. If I'd ever had a chance to put one in great light during that time, it might have gone differently, IDK. Other plants have always gotten the front-row seats by windows.
I LOVE purple plants too! Some are more obviously purple than others that just have a hint of it, and some are only purple on the reverse side of the leaf. Some can only be purple with tons of direct sun. Some genera listed have many members that can be purple.
Alternanthera atropurpurea
Begonia (various Rexes)
Calathea (prayer plant)
Callisia fragrans (basket plant)
Callisia soconuscensis
Codiaeum variegatum (Croton)
Echeveria
Gibasis geniculata (Tahitian bridal veil) purple reverse
Graptopetalum
Gynura (purple velvet)
Hemigraphis (purple waffle plant)
Iresine (chicken gizzard / beefsteak plant)
Kalanchoe pumila
Kleinia petrea (trailing Jade, formerly Senecio jacobsenii)
Oxalis triangularis (purple shamrock)
Peperomia caperata
Perilla (often mistaken for a Coleus)
Plectranthus
Pseuderanthemum
Sedums (stonecrop)
Senecio citriformis
Strobilanthes dyerianus (Persian shield)
Tinantia pringleii (has purple spots)
Tradescantia pallida (purple heart / queen, formerly called Setcreasea pallida)
Tradescantia spathacea (oyster plant, formerly called Rhoeo spathacea) purple reverse
Tradescantia zebrina (wandering Jew)
Tripogandra serrulata (purple scimitars)
Whether or not each would do well in a given location would depend on conditions available.
