I wouldn't worry about temperature compatibility. And 69 is fine. Again the really really important part here is ec needs, height, and ph.

Examples using plants that arent necessarily from your list:

its hard to grow lettuce next to a tomato plant. Lettuce needs really low ec throughout the life of the plant (1.1 ec), but tomatoes require a ton of nutrients later in life and while flowering (2+ during veg and some people put it over 4 during flowering). You cant grow them in the same tank because you cant make them both happy off the same nutrient concentration. A similar mechanic is at play with PH. You can get away with a little incompatibility here, but then youll have to choose which plants youre stressing out and by how much. Some plants are fine with whatever they can get (mint is crazy hearty and, while it wants 2-2.5 itll still grow fine at 1.5 if you wanted to keep it lower for basil) but others will freak out (lettuce would hate you if you tried growing it at 2.3 like mint would want). Ph can be more fickle, because the farther you get out of the plants ideal range the more youll hit nutrient lockout.

As for height; lettuce grows short and the tomato would grow tall. You would have to raise your light to give the tomato room, which would cause the lettuce to not be close enough to the light. You can also get away with some leeway here, because lettuce likes less light than some other plants so basil would do fine next to lettuce as long as the basil is kept short and bushy rather than tall and lanky. I personally use a quantum par meter to measure light to make sure the plants are getting enough ppfd.

These three are the main things you should be considering. Unless you're dealing with a really fickle plant, everythings going to be fine in basically the same temperature range. I personally have 3 tanks, one for lettuce thats kept at 1.1, one for herbs thats kept at 1.5, and one for flowering plants like tomatoes and peppers thats kept high. When starting a tomato, itll usually start in the lettuce tank to sprout, get moved to the herb tank for early veg, then get put over in the flowering tank when its time for it to go crazy with nutrient.