Definitely strive for daily variety. Remember these are birds that in the wild eat over 150 different types of fruits, leaves, insects, etc. Even if it is seasonal they still may eat a dozen or more different foods a day. Offering variety is one of the easiest (and I think most important) ways bird owners can provide mental and physical stimulation or enrichment.
Birds spend the majority of their time in the wild searching for, handling, and eating their food. So it only makes sense that we, as pet owners striving to keep them as happy and stimulated as possible, should try to mimic these conditions.
A little while after acquiring Kevin I met and talked to the owner of a toco toucan (who is now quite internet famous) who insisted that the only "responsible" diet for a ramphastid was blueberries, papaya, and mazuri pellets. Nothing else was "good" enough i.e. had a low enough iron content (and I am a terrible owner for feeding Kevin high iron foods like sweet potato, greens, blackberries, etc).
Of course, me showing them that other reputable breeders/zoos feed their birds a wide variety of seasonal foods for enrichment, or the food chart explaining in detail the actual iron contents of many foods did not help convince him to try other foods. Which makes me just feed bad for his toco as anyone would be able to see just how much Kevin enjoys have the ability to pick and choose what he eats, as well as how he eats it. Grapes, pomegranate, and blueberries are his hands-down favorites but he will immediately go for anything stuck on a skewer first when breakfast is served. Even if it's just boring old papaya. He loves to rip it off, shake it around, and hang from perches to nibble off every last bit. Foraging boards (basically pieces of wood with holes drilled through them in which I stuff berries or harder foods like carrots) are another favorite, especially when I thread long colorful strips of paper through some of the holes which he can then pull out. Greens are a whole other story. He often likes to quickly throw them all out of his bowl right away, then chase them down to the bottom of his cage where he flicks them over his head before finally deciding they are "dead" and eating them.
Sorry for the rant lol. I guess it's just scary how many people I've heard of who seem to think that toucans/aracaris, unlike parrots, are good with just papaya or that they don't enjoy foraging. At least one other people admitted to only feeding cantaloupe and their aracari died from gout and other complications within a couple years. So here's to spreading the word that you should try to let your aracari's have fun with their food!