The Fly Baby is a very popular Home Built aircraft with a good amount of RC options as well.
It first flew in 1962 and was designed by Boeing historian Peter M Bowers.
The Fly Baby can also be converted into a Biplane called the Bi-Baby.
http://www.bowersflybaby.com/ is a great unofficial Fly Baby web site
Is a great resource, If you are an EAA member there are Sport Aviation articles ranging from 1962 – 2005 plus a pdf download of the 74 paged Building the wood airplane part of EAA’s “HOW-TO” series from way back.
Now for some RC options, Outerzone has a bunch, here are some that look quite workable today with electric power.
56″ Span from Modellismo in 2012
72″ span from RCM in 1980
And for some kits & Arf’s
Sig 68″ Span = https://sigmfg.com/products/seagull-models-bowers-flybaby
Balsa USA Giant 112″ span = https://shop.balsausa.com/product_p/447.htm
Balsa USA Giant 88″ span biplane version = https://shop.balsausa.com/product_p/452.htm