So far, two politicians come to mind. Leopoldo López (who is in prison) and María Corina Machado (who has been removed from mainstream MUD and derided as a "divisionist" by the MUD themselves). Their reach is extremely limited, though. No access to goverment-controlled media and conveniently forgotten or shunned by mainstream opposition.
Regarding Ecuador, I'm not sure. I do not have a full picture of the economic circumstances Ecuador considered then and how they relate to ours, right now. If anything, --if-- we were going to try that measure it should be after we try other methods to increase trust on our currency and then find them to be insufficient, I think.
https://en.m.wikipedia.org/wiki/Currency_of_Ecuador
"The sucre maintained a fairly stable exchange rate against the US dollar until 1983, when it was devalued to 42 per dollar and a crawling peg was adopted. Depreciation gained momentum and the free market rate was over 800 per dollar by 1990 and almost 3000 per in 1995.
The sucre lost 67% of its foreign exchange value during 1999, then in one week nosedived 17%, ending at 25,000/US$1 on January 7, 2000. On January 9, President Jamil Mahuad announced that the US dollar would be adopted as Ecuador's official currency. Protests led to his removal. Vice President Gustavo Noboa became president, only to confirm the government's commitment to dollarization.
On March 9, 2000, Noboa signed a law passed by Congress, replacing the sucre with the United States dollar at an official exchange rate of 25,000 sucres per US$1. Both currencies were to circulate, the dollar being used for all but the smallest transactions. Only coins would continue in the local currency."
Also, do you think there's any chance of doing what Ecuador did in similar circumstances by making the US Dollar the national currency? At least until the fundamental problems are sorted out.