[name_m]Levi[/name_m] [name_m]Ezekiel[/name_m] has the best flow as a combo.
I would avoid two of the same sounds together like…
[name_m]Isaiah[/name_m] [name_m]Levi[/name_m]/[name_u]Elias[/name_u] [name_m]Levi[/name_m] - “i” sounds or heavy on the l’s
[name_m]Isaiah[/name_m] [name_m]Ezra[/name_m] - s/z sounds are similar and can be lispy
[name_m]Isaiah[/name_m] [name_m]Ezekiel[/name_m] is cumbersome and difficult to say. [name_m]Ezra[/name_m] [name_m]Levi[/name_m] is short (each are four letters) and shares a two-syllable count with your surname.
[name_m]Ezra[/name_m], [name_m]Isaiah[/name_m], and [name_m]Ezekiel[/name_m] all have that same z sound in them, so I’d avoid pairing them up
I like:
[name_m]Ezra[/name_m] [name_m]Levi[/name_m]
[name_m]Levi[/name_m] [name_m]Ezekiel[/name_m]
[name_m]Isaiah[/name_m] [name_m]Levi[/name_m]
in that order