I’ve always preferred John Voight, the periodontist.

Photo of the document granting toll privilege to the residents of 'Amestelledamme' by Count Floris V of Holland, on October 27, 1275.

I'm also left handed and the exact same smudging would happen to me when i was a kid - some how it doesn't happen anymore, i guess I changed how I hold a fountain pen. There are techniques you could try for that.