If you liked the Bastard!! anime, the Anime-Planet community thinks you'd like:
Meet Chivas Scotch: a sorcerer with a style all his own. The opposite of benevolent and honorable, he's an arrogant and domineering misogynist who travels the lands with his (mostly female) servants, searching for opportunities to indulge his greed and his desire for female flesh. But when he comes across a scheme by a mad wizard to ressurrect an ancient god of darkness, all hell breaks loose as Chivas suddenly finds himself the lesser of two evils!
Both Sorcerer on the Rocks and Bastard deal with a lecherous and highly powerful wizard who is a lot more concerned with his own ambitions than what is 'right' or 'good,' and only decides to fight evil in the show because they pissed him off on a personal level. Both also contain a good amount of ecchi and comedy.
Like extremely arrogant and powerful sorcerers, and ecchi? Both Bastard and Sorcerer On The Rocks have that and are lots of fun. Sorcerer On The Rocks is a bit shorter, but demon fights and evil sorcerers are just as present in Bastard!! No doubt that both will give enjoyment to someone who liked either one of them.
It has been four years since Pai, a young girl born from a race of powerful creatures, disappeared without a trace. For Yakumo, Pai's love and Wu, reuniting with her is bittersweet -- for she has amnesia, and has no memory of her past. Now, with many enemies rising against them, Yakumo and Pai must strive to unlock the spell which seals her memory, so that she can defeat the evil Benares once and for all.
When Amon was a young boy, his mother was viciously murdered by the masked emperor of the moving city Valhiss. Years later, a stronger Amon has returned to exact revenge and successfully manages to infiltrate the city above ground, only to come face to face with the beautiful kidnapped princess Lichia. Against all odds, Amon must now avenge his mother, destroy the evil emperor, and save the lovely princess all at the same time! The days are never dull in the life of a hero...
Both Bastard!! and Amon Saga have that same "sword & sorcery" feeing, and feature fantasy worlds in which monsters roam free and great tyrannical rulers try and conquer all the good and just nations of the world.
Of course, while in Amon Saga our hero is truly a hero who must face his trials in the usual way, in Bastard our hero simply beats the piss out of everything -- being so overpowering, he can just do whatever he pleases. Both of them, however, are out for revenge and have an archenemy that they want revenge on (who, in both cases, happens to be a tyrannical ruler out to conquer/destroy the entire world).
In times of olde, humans live in constant fear of demons known as yoma. These vicious creatures can take the appearance and memories of humans they have devoured, thus blending into society as they freely feast on human flesh. The key to stopping the yoma lies with the tolerated yet feared Claymores - women who are half-demon, half-human, and fully fated to become the demons that they hunt. Meanwhile, in a village, the young Raki has been banished; his only crime was losing his family to the yoma. Raki is drawn to a Claymore named Clare, and together their journey begins. While Clare fights the yoma plaguing the land, can Raki help her in her struggle to retain her humanity?
30,000 years after a battle between good and evil, demons once again threaten our world; but now, the battlefield has changed. Japanese housewives attack with perfectly cooked noodles, middle-aged seductresses tempt both good and evil, and high school aged guardians must take exams that are more terrifying than any battle! This time, the dark lords strive for a different ending to the eternal battle, while the guardians hope to change the past as well. Is there any way to protect the world from evil without giving up their own lives?
The reason you would probably like both of these if you like one, is that they share the same sense of humour. Both main characters are (in their own way) ridicilously powered individuals with more concern for themselves than the common good. As a result fights appear to be more about class, style and mental state than sheer firepower.
Next to that: Though the storylines and personalities might appear a bit shallow, both main characters actually are pretty deep.