Well, you can look to rulers of current nations and past nations for inspiration.
Xin was Lawful Neutral. The other Runelords were all evil, to varying degrees be it lawful, neutral, or chaotic evil.
The Crown Prince Stavian III of Taldor is Chaotic Neutral.
The Queen of Mendev is Lawful Good, but Good does not necessarily mean nice, especially when the border nation is the World Wound.
Kevoth Kul is Chaotic Neutral, and currently obsessed with fulfilling his own hedonistic desires and depredations, though before his desires were more about conquest.
Grask Uldeth is Chaotic Evil. Utterly unforgiving, enforcing his law through violent means which are necessary due to the nature of Orcs. However, he's highly intelligent and a bit of an idealist in the sense that he wants his people to take to his ways, so they can move forward into a new era.
Mengkagare is supposed to be Lawful Good, but good is not nice, and aspects of his perfect society, this concept of improving man, are the stuff of eugenics programs that we shudder when we think about.
The list goes on. Alignment doesn't mean much. Grask Uldeth for instance is quite cosmopolitan, but still uses evil means to enforce his will. Would he be so evil were he an Orc ruler in lands where humans or other races were the majority? Possibly. The truth is he wants more for his tribe, and for his people as a whole. If he were a king or warlord in human lands, even as an Orc, he probably wouldn't be so utterly barbaric, considering his intelligence. However, circumstances demand action. You should definitely take that sort of thing into consideration as well for alignment.