Instead of finding saints supporting salvation without faith in Christ I found the opposite:
Here again we see St. Francis Xavier eliminating any idea of salvation for “the invincibly ignorant,” excluding from salvation even those ignorant souls whom he thought would embrace the Faith if they were taught it!
You pretty much said it all in the OP when you said: "...those who honestly seek God will find Him in this life."
Invincible ignorance will not be used as an excuse among people who have the capacity to reason. Our Lord said in Mat 16:9 that not believing in Him, in His Church, is a sin. No disclaimers, no exemptions of any sort, He said it's a sin. To die in that sin will put one in hell. In Mat 7:23 He said He will say: "I never knew you, depart from me you that work iniquity."
He says those who choose to remain ignorant are iniquitous, not virtuous.