Where there any Eastern Roman Emperors that were considered to be "kind" relative to their time
In history there were many capable and competent Eastern Romen Rulers equal or greater than their Western European or Muslim counterparts.
However, one lingering perception of Eastern Romen rulership and politics, at least in pop sulture, has been it's legendarily ruthless and cut-throat politics and Emperors.
And while I am sure this has been exaggerated by enlightenment era writers, actions such as the blinding of the Bulgarians don't exactly paint the most "heroic" portrait of Roman rulership.
So what Emperors were, given their time period and the necessities of the job, actually fairly decent people to their subjects and family members.
Being an Emperor precludes anyone from being a saint, but was their ever an Eastern Romen Saladin, Cyrus, Taizong , Frederick the 2nd of the HRE, or Ahsoka.