Since we can see in the passages you’ve cited that God’s wrath is always based on Justice, and these passages even emphasize this point, wrath can’t be said to contradict Justice. Indeed, Justice demands wrath in the case of evil actions, so to be without wrath would actually contradict having Justice. See this entry in the Summa regarding
anger. Now, Justice and Mercy are not at all contrary, and since wrath is a necessary component, if Justice and Mercy are not contrary, then wrathfulness and Mercy can’t be contrary. You can see how Justice and Mercy fit together
here. Now keep in mind that I’m assuming that by benevolent you include merciful, so if you don’t mean that, let me know; the definition of goodness in traditional Catholic theology is perfection, but I’m straying from that since most people today do not mean perfection when they say “good”.
Now let’s go back to your list:
–omniscient
–creator of all
–benevolent
–wrathful
We’ve seen how benevolence, meaning willing good (“bene” = good, “volent” = will) is compatible with wrathfulness, and in fact necessitates wrathfulness. As Thomas Aquinas argues:
"Justice and mercy appear in the punishment of the just in this world, since by afflictions lesser faults are cleansed in them, and they are the more raised up from earthly affections to God. As to this
Gregory says (Moral. xxvi, 9): “The evils that press on us in this world force us to go to God.”
So, are these things compatible with being the “Creator of All”? Quite so, in fact. Benevolence is demonstrated by God creating anything at all. By the very act of creating God is showing His generosity because nothing that creatures do requires that they be created. In fact, they have to be created in order to do anything at all. We can see that to be the “Creator of All” requires Benevolence, and benevolence requires a component of wrathfulness from the quote above.
So are these three things compatible with omniscience? Yes, in fact omniscience demands that things be created in order for them to be known. One can’t know that which does not exist, so in order to know all things pertaining to the world, the world would have to be created. Creating the world necessitates benevolence, and benevolence requires a measure of wrath.
So we can say the following without any contradiction at all:
God knows all things, and all things are created by God by virtue of His benevolence, that itself necessitates wrath.
If you meant something different by any of these terms, please let me know. I pushed ahead only because you said you would be in bed, but I’m happy to make amends to this if my assumptions as to your meanings prove incorrect.
You also asked if Catholics base the capital sins on Thomas Aquinas work. They are most effectively illustrated and explained there, yes, but remember that capital sins are not a part of Catholic dogma, meaning that they are definitions required to upheld precisely as described by Aquinas. Rather, Aquinas tried to illustrate the principle sources of what was already regarded as sinful behavior as described in Scripture, and called these the “Seven Capital Vices”, from which we get the “seven deadly sins”.