There’s so much to like here: crisp-roasted chicken thighs, fresh cherries, croutons cooked in schmaltz (see what I mean about the not-healthy part?), and a very good vinaigrette. Leaving out the chicken will save you time and make this both vegetarian/vegan and much healthier. (With that option I would toss the bread with olive oil and toast the croutons in the oven.) But if you want Death-by-Salad, make it as written.
Note: my store was out of butter lettuce so I just used mixed greens from my garden. I think any kind of green would work well here, including heartier ones like Romaine.