I'm fine with all of your names, but just a handful of thoughts, if you care:
Never even consider Rutoga. It's not romanization, it's romaji. It's no more reasonable to use that than it is to have Roi, Makasu, Aren, Ransu, Woruto, and Bozu (just guessing on what their Japanese names are) be your starting party.
I have mixed feelings on Ogier. I like the pronunciation, but it just looks like Ogre to me :/ I personally fall on the Oujay/Ojay/whatever side of the fence, but I'm sure I'd get used to Ogier.
I don't particularly like Jerrot, but you don't really have any good options for him. You could kind of justify Jared or something, but that's a stretch and also FE10. I kind of want to suggest Jarret over Jerrot, but that sounds really nitpicky to me, and may not actually carry over the correct pronunciation.
For Arcardo - I'd just drop the o for Arcard. Arcardo kind of feels like a Rutoga style romanization to me.
Edit: Allen makes Alance not as good a name combination :( Also, are Allen and Alan actually pronounced differently?