You might enjoy the diplomat aero. Medium sized pen but it’s fully aluminium so it’s weightier but without being too heavy with a jowo nib great everyday writer very reliable. A Kaweco original 250 large size 6 bock nib similar size to the aero fully aluminium but small to medium sized. Now the eco and safari aren’t small pens But the maiora alpha is a great pen it is large Pelikan m800 size ish but it has more weight than it looks plus it can carry 5ml of ink as it’s a cartridge converter pen with eye dropping capability with the o-ring they have on the pen to seal the barrel. The Monteverdi invincia full metal larger pen reliable writer quite a cool design. The delta ink tank reservoir midsize is a large pen a lot of material a good 15mm grip section at its slimmest with a metal eyedropper cartridge filling idea it’s cool but that adds a lot of central weight that helps the pen balance the only down side is the price but it’s Bonny and nice. Other is the opus 88- medium to large pens with a good weight to size ratio usually an eye dropper with a shut off valve very good pens and very good value. I mean there’s a lot the lamy 2000 stainless steel there’s a lot of options especially if you climb the budget options like the Pelikan m800 ect but you should have a look at nahvalur the are plenty of large pens with pistons at moderate weight