Well, yeah. That's a good idea. It's just a shame that the LVT-30's and LVT-45's don't have enough oomph.
The Saturn Ib comparison is good and I just slapped one together in the VAB, two S3-14400 tanks and 4x30 + 4x45. Using the new parts of course. TWR is under 1 and the relative dimensions of that thing is pretty much the same as the S-Ib stage except the real thing has a TWR closer to 1.6 if I calculated it correctly.
Replace one S3-14400 with a S3-7200 and you're above 1.2 TWR but now it looks too stubby.
Or you could add another LVT-30 to the center (shh, no one saw) which then gets you a little above 1.1 for launch TWR.
Yeah yeah, this isn't real life but still
