With your other fish, not a good combo from my experience. The Zebra Danios would normally be zooming around the upper levels of your tank which will stress an ABF and as the ABF approaches adulthood, it would most likely take "pot shots" at catching the danios in their huge trapdoor mouthes!
Having just seen your "aggressive Yoyo Loach" thread, along with the 60l tank size and your other fish in this thread, I urge you to strongly consider a 4-foot tank upgrade. Despite their small adult size, Zebra Danios (like many common danios in the hobby) are very active fish, that would eaily make full use of a bigger tank. In addition, Yoyo Loaches are social fish that really need a group (your singleton might be hassling tankmates, trying to mimic the hierachy in a normal group of Yoyos) and as an adult needs more space than a typical 2-foot 60l tank. Depending upon what pleco you have, you could potentially have another unsuitable fish for your current tank.
On the other hand, with some floating plants like Canadian Pondweed so break up the water surface, you could possibly entertain two sedate African Butterfly Fish (despite their maximum adult size of ~10cm) in a 60l. Sedatory tankmates that normally stay in the lower water and are happy around 26C in very gentle current usually work well, providing they are deep bodied and reach over 4cm (excluding tail fin). For example, a single Leopard Bushfish.
