A few wines that are less expensive but should get you a good feel of the region for nebbiolo. These will all be traditional producers due to my personal preferences. These may not be the producers’ iconic wines, but are for me the most typical and value driven ones.
Brovia
Base barolo
Villero
Rocche
Produttori
Base
Rabaja
Montefico
Asili
Ovello
Paje
Burlotto, but it has gotten too expensive on the secondary market. IMO, top to bottom and all varietals, at cellar door or true retail prices, his wines are among the best in the Langhe
Poderi Colla
Barbaresco Roncaglie
Bussia
Vajra
Ravera
Bricco delle Viole
Baudana Ceretta
Roagna
Langhe Nebbiolo
Paje
Pira
F Rinaldi
Brunate
Cannubi
Oddero since vintage '13. Prior to '13 I think their wines were an exercise in wasted potential
The base barolo is a terrific value.
Villero
Rocche
Luigi Oddero
Base Barolo
Rocche Rivera
F Allessandria
San Lorenzo
Monvigliero
G Fennochio
Villero
Cavallotto
Bricco Boschis
V San Giuseppe
Marcarini
Brunate
Cogno
Ravera
Bricco Pernice
Vigna Elena
Barale
Serraboella
Serafino (not Sylvia) Rivella
Montestefano
Cappellano
Rupestris
Franco
I am sure there are several others I am forgetting and a few I am purposely omitting for selfish reasons.
I love G Rinaldi, B Mascarello, and G Conterno, but at current US pricing I only buy B Mascarello and only a few bottles a year. I stopped buying G Rinaldi and Conterno after 2013. Although I did make an exception for the astoundingly good '15 Francia.
There is plenty of outstanding wine being made and there is no reason to chase the iconic wines at this point unless you have unlimited funds.
Hope that helps.