User:2^67-1/Some temperaments
Tunings with a fixed 81/80:100/99:121/120 ratio
By approximating this and picking only best approximations using a crude Python script, one finds the following ratios of distances corresponding to these ratios. These are all tempered out by 7edo.
1:1:1 larry (7&65) 2:1:1 artoneutral (7&87) 2:2:1 twentcufo (7&118) 3:2:2 trinity restriction (7&152) 5:4:3 7&270 6:5:4 7&335 (what I call neujahr) 15:12:10 7&829 21:17:14 7&1171
Tunings with a fixed 64/63:81/80:100/99:121/120 ratio
1:1:1:1 abergravity (7&58) 2:2:1:1 artoneutral (7&87) 4:3:2:2 7&159 5:4:3:3 7&224 6:5:4:3 7&270 8:6:5:4 7&335 (what I call neujahr) 19:15:12:10 7&829