Personally, I’d group fountain pens into 4 series-es, with some famous/ classic pens in each as follows:
- Entry level $30 – $60 – Steel nibs, plastic body
- Lamy Safari
- Twisbi Echo
- Mid-tier $100 – $300 – Gold nibs
- Pilot VP
- Lamy 2000
- Pelikan M800
- Rotring 600 (steel, discontinued)
- Expensive pens $400 – $1,000 – Larger size
- Montblanc 149
- Visconti Homosapiens
- Pelikan M1000
- Conid
- Graf von Faber-Castell Classic
- Super-Luxury Extra Something Level – $1,500+ – Limited edition, rare
- Omas Arco
- Visconti Divina Proporzione
- Montblanc Hemmingway
- Namiki / Nakaya Urushi
For inks, I’d say the most famous is Pilot Iroshizuku Kon-peki.
It’s blue, so will be the most mainstream, because people can use it daily even for business writing – it’s a generic standard blue – nice and bright with good shading – many many people seem to love it a lot. Then maybe Sailor Jentle Yama-dori – sheening turquoise.
For non-standard, Iroshizuku Yama-budo, Noodler’s Apache Sunset/ Golden Brown/ Black Swan in Australian Roses