elouicious made a very good list. I would add the Red and Escarlate (Scarlet) varieties of jaboticaba to that list. They are not rare, but they fruit quickly in comparison to other jaboticabas and should be in all Myrtaceae collections. I also have Eugenia victoriana. It does not get especially large, so I believe it is a good candidate for growing in containers long-term, though there has been debate on the forum regarding whether its sourness negatively affects its edibility.
Eugenia brasiliensis, Eugenia involucrata, Eugenia luschnathiana, Eugenia pyriformis, and Plinia rivularis probably all grow too large for successful, long-term container culture, so you might want to stay away from those. But, I am growing all of them in containers, so I am obviously not following my own advice.
Hmmm, victoriana might be one of those species that is great in juice, jams, or smoothies. Sounds like something you could put sugar on and eat raw as well!
I watched a video of a Costa Rican fruit forest tour. The people in the video ate E. victoriana fruits out of hand, and though they remarked about how sour it was, that did not seem to affect their enjoyment of it. On the other hand, forum member Mike T likens it to eating paint stripper. So, a slight difference of opinion. I will find out my feelings about it if my plant ever grows large enough to fruit.
I now realize that elouicious and I both ignored Psidiums in our previous lists. Many Psidiums get too large for container culture, but Psidium firmum, Psidium friedrichsthalianum, and Psidium striatulum all stay fairly small. Pruning is probably required for all of them.
Also, there was another thread that mentioned a couple of smaller Campomanesia species that might be suitable for container culture:
https://tropicalfruitforum.com/index.php?topic=9899.msg414036#msg414036.
Finally, I had forgotten that Austromyrtus dulcis, the Midgen Berry, is a Myrtaceae. There really are a lot of Myrtaceae. I am not personally growing this species, but it is a popular Australian bush tucker fruit. It also stays small.