I can vouch for the following:
Rolleicord IIa (1939, with the wonderful Triotar lens...bokeh to die for and a very sharp lens, too The Rolleiflexes from the 30s and later can be a dodgy prospect unless they have been recently serviced...their advance mechanisms are more complex. Apart from the film advance, there is no difference in the build quality between a 'cord and a 'flex...and the 3.5 vs. 2.8 lens debate is a lot of complaining about how the groundhogs have dug up the garden...the 3.5 lenses are every bit as good, and often sharper at wide open.)
Mamiya C33 (mid 1960s..yes, it weighs about 4 pounds, but it and its C-series cousins are the only interchangeable TLRs out there...great lenses and wonderful quality)
Agfa Isolette (do not fall for the myth of all of them needing new bellows...that simply is not true).
Pentacon Six TL (the ones made in the late 1980s/early 1990s are quite good, and do not suffer from as many quality issues as the earlier ones).
Yashica (the D models are quite good, avoid the "A" model which suffers from a poor lens and the 124G suffers from an iffy advance mechanism and very high price tag [keep in mind that these sold for $119 in the early 1980s...they are not worth much more than that now.]
I personally would avoid the Lubitels (eye-strain waiting to happen and poor quality throughout...ditto the Seagulls....) Any of the over-priced dreck from Lomography should be avoided...those people are nothing but a shower of morons. Avoid hipster chic (what my generation called "Blue Jean Conformity.")
If all else fails....there are a lot of Agfa-Ansco 120 box cameras from the 1930s and 40s out there...often for a couple of dollars, because no one seems to know about them. If you see these and they state "B2 film", that is Agfa-Ansco's designation for 120 film.
Also....if you see Kodak Brownie Hawkeye cameras with the gray plastic advance knob, they will often accept 120 film...if you have a 620 take-up reel. These too are often very cheap. They are far better quality than the Holgas.
One does not need to spend a lot of money on these. Avoid the Idiot-net. If you play your cards right, many times you will find these locally...and for cheap...and possibly even for free. Most of what you will find on the net passing for information is nothing but nonsense and hearsay..I've been selling cameras for nearly 30 years. Feel free to email me...happy to help.