You're still young, high on testosterone, fantasy worlds and life itself. I strongly advise against messing up your life like that if you're not absolutely in for a billionaire heritage of sorts.
Yes, I do enjoy feeding pig to Muslims and Jews, but I don't sneak alcohol into the recovering alcoholics OJ and I don't give weed to the schizo. There are boundaries that should not be crossed, so I really want to express my not being too happy with your plans. Getting rid of the name your parents gave you means disrespecting them, and if that's all there is to it at the core of this stunt, there are other ways that don't mark you as an idiot and the odd-one out.
If all else fails, Siefer Almasy is best. Anyone who doesn't know where it comes from will just assume you're just an immigrant from Eastern Europe with German and Jewish heritage. Even a moderately literate Arab would understand 'Almasy' as hailing back to Germany. Siefer should be fine for any complexion you're featuring, even though a lot of people will assume your parents made a spelling mistake of sorts - any negative connotations of that line of thought would be, of course, countered by your surname of choice.
In Swahili, Almasi means 'diamond', and if fancy and rare are your thing beyond collectible cards, I think 'diamond' should suit you well and allow you to wear it with pride. Since 'Al' is also a proper Arab (definitive) article, your last name could also be perceived as being Al-Masy, meaning The Masy, whatever a 'masy' is or could be.
Calling yourself 'Darth' is stupid, as the Dark Side is not to be messed with, and if you do, you do it in darkness, silence and hiding. 'Prince' and 'Vegeta' are both exceedingly stupid. Come on, Michael Jackson's dead, and he made a very sad and sorry corpse. Not even touching 'Legato' and 'Yggdrasil'. They all make you sound like a toon, but 'ave eet ur wei!