This became a very hot issue in the microlight world some years ago, as result several of the manufacturers started certifying or recertifying for quite high seat loads.
Obvious aeroplanes (to me) might be:
Flexwings
=======
- Air Creation, any of the 450kg kits (iXess, Tanarg, KISS-450) all have an MTOW of 450kg, empty weight around 250kg, and maximum seat load of 120kg per seat (possibly 105kg in some older models). Sold in the UK by Flylight at Sywell.
- P&M Quik GT450: MTOW 450kg, empty weight around 250kg, seat limit 110kg.
- Pegasus Quantum: MTOW 409kg, empty weight around 205kg, seat limit 110kg. Probably the cheapest option, lots on the second hand market as everybody who had one was desperate to get a Quik as soon as they came out. 503 engine is underpowered: get a 582 or 912 engined version, latter is nicer but heavier.
3-axis
=====
- The Reality Escapade has a 450kg MTOW, empty weight around 260kg, maximum seat load of 120kg per seat. (Buy the taildragger version, much nicer ground handling than the castoring nosewheel version, and looks right too.)
- The tandem Reality Easy Raider has the same MTOW, but is usually substantially lighter, and is limited to 100kg per seat. It however doesn't have dual controls and the rear seat is horribly cramped.
- Sky Ranger, 450kg MTOW, empty weight about 260kg, maximum seat load of 120kg per seat (if you get a lighter 582 engined version, try and put a 3:47:1 C or E type gearbox on it)
G