[IAmBatman]

Two of the biggest ones that both intrigue and elude me are Metron and Desaad.

For some context on their potential power sets:

Originally Posted by WikipediaMetron

Like most of the New Gods, Metron is immune to all diseases, being virtually immortal. His advanced physiology makes him stronger and more disease-resistant than humans. Metron has demonstrated numerous god-like abilities somewhat inconsistently throughout his history. Metron is a super genius who has explored the universe and gained a vast amount of knowledge. Although Himon is his superior at devising scientific theories, Metron surpasses Himon as a creator of inventions based on scientific theories. Metron travels in his flying Mobius Chair, which enables him to travel through time, outer space, and other dimensions. Its tractor beams are powerful enough to carry a planet along behind the chair and can create an impenetrable energy wall. Metron has also created incredible technological wonders that are too numerous to mention here.

Originally Posted by WikipediaDesaad

Although DeSaad doesn't have great powers, he is still immune to all diseases, toxins and is extremely long-lived. He is also stronger and more resistant than a human of his weight and build. DeSaad is a brilliant inventor of weapons and master of torture. DeSaad has created a lot of torture machines and devices. His most spectacular achievement is "Happyland", an amusement park that served as a prison for his victims. The prisoners were anguished over the seeming indifference of the park's customers to their plight unaware that DeSaad's technology caused the visitors to see them as something other than what they were. As the closest Darkseid assistant, DeSsad is familiar with the functioning and resources of the planet.

The New 52
In the New 52, DeSaad reappears with the status of a New God, but much more powerful and showing new abilities. DeSaad is strong and resistant enough to lift several tons easily and can face powerful beings like Power Girl. In addition, he has a high level of invulnerability and is functionally immortal. The new DeSaad's powers include telepathy, absorption and control of emotions. DeSaad is able to enter people's minds to manipulate their emotions and feed on their worst feelings, even without manipulating them becomes more powerful. He has demonstrated the ability to create illusions, either in its real form, or in the form of other people. Another of his powers is the absorption of energy, he can feed on different types of energy and even manipulate it, as was demonstrated when it absorbed energies from a particle accelerator on Earth-2. Although it isn't explained, DeSaad can open a "Boom Tube" to other dimensions at will, only when he is at maximum power.