They both feel “harsh, dated, and indeed ugly AF” to me.
I have no idea where you got “fresh and pleasant” from stilted-sounding
Olga. You can even almost say “old” in the begging of the name. Olda.
I agree with you about
Helga, though. Definitely unappealing.
I guess I have one “ugly” name that I like:
Hilda. I don’t know what I find charming about it, but it just doesn’t seem as ugly to me as everyone thinks it is. I guess
Hilda Berg made me warm up to it? I also like
Hilde, but not really
Hild or
Hildegard.