I’m guessing too much spiked egg nog rips away one’s sensibilities. His two other posts in the same general time frame appear to ne in conjunction with this diatribe.
Rolling through the WS to the SB doesn’t offer much, but it does get better as you head south. The WS has the least - Nong LA is probably closest to what you’re looking for, but it is small and the menu is limited.
Gingergrass is Vietnamese but my wife says many of the dishes have an “American” feel to them. She said the ingredients are very fresh though (IMO critical in this cuisine). GG is also far out of the way based on your implied travel route.
The SB has far more Vietnamese choices - mostly Lawndale and Gardena - but probably don’t fit your wants either.
None that I can think of or have been to have the atmosphere of TT or a broad menu that is worthy. The ones that score higher on “Vietnameseness” tend to be in the rougher parts of Gardena (Pho Ever on Rosecrans and another place on Crenshaw). Secretasianman referred to the geographic separations of the cuisine - his understanding and sophistication level is obviously higher. I personally wouldn’t get caught up in that as long as a place’s renditions agree with your palate. Most places outside of Little Saigon are going to offer generalist menus for the most part with some adding in a regional dish or regional section on the menu.
This really leads you down to north OC. Brodard and Vien Dong light years ahead of anything to the north. Vien Dong is more homey and the servings seem huge, especially the generous portions of greens and herbs… Brodard’s atmosphere is probably closer to TT. I defer to Porthos and the other OC members as to which is better.