I would have recommended FA Forest Fruit if JoelID hadn't beaten me to it. It's a favorite of mine to mix with. I find it a little dark to
vape lots of as a standalone, but it's very good. I've also heard good things about CAP Harvest Berry, but I don't have it yet- on my list. Sounds like it's similar, but brighter. Not sure if Berry mixes meet your criteria, from the above, but thought I'd mention it.
FLV Wild Melons is very good. It only qualifies as a mix because it is clearly not one melon though- not a real fruit medley, I'm afraid.
Medicine Flower makes the best fruit flavors I've had (the Honeydew is a particular favorite of mine, and maybe my favorite standalone flavor,) and they do have a tropical fruit medley, called "Tropical Fruit." I haven't had it yet, but am going to get some in one last MF order from
ecigexpress (who have them as "Lotus Flavors," but are going to discontinue carrying them.) I haven't tried it, so I can't vouch for it, but given my experience with MF I wouldn't be surprised if it were the best tropical fruit medley around. Just be aware that the MF flavors are both very concentrated and require a much longer steep than most artificial fruit flavors.