Transiting planets (from the NASA Exoplanet Archive as of January 2022) with radii smaller than 2 R_⊕ and dynamical masses measured via TTVs or RVs as a function of distance from the Sun and the transmission spectroscopy metric (TSM) from Kempton et al. (2018). The color indicates the equilibrium temperature of the planet. Planets in the habitable zone have equilibrium temperatures ranging between 200 and 300 K and are depicted in turquoise. Following the division in Kempton et al. (2018), circles indicate terrestrial planets (R_p < 1.5 R_⊕) and triangles indicate planets in the super-Earth and sub-Neptune range (1.5 < R_p < 2.8 R_⊕). The blue dashed lines indicate the TSM top quartile threshold to select the most amenable targets for atmospheric characterization studies with the JWST for each class.