I'm sorry, but the bonsai tree only provides minimal hiding/relaxing area for Doc. I'm all for springing for the pretty decor, but it is important to also take the fish's preference into account. I am glad that you plan to invest in some tall plants as well.
20g long NPT: 3 german blue rams, 1 powder blue dwarf gourami, 12 harlequin rasboras, and 2 otos
20g regular PT: 9 female bettas, 6 dwarf cories, and 2 mystery snails
10g divided PT: 1 male DT Halfmoon betta and 1 male Super Delta elephant ear
2.5g: 1 male Halfmoon betta