Well I have a very nice Wilier CF bike I bought in 2013. Then in 2017 I bought my Habanero TI and it weighs about 17.8 pounds without pedal and the Wilier is maybe around a pound lighter tops. In any case have not road the Wilier more than maybe 6-7 times since then. The TI just has a better ride and much more quiet. It makes hardly a sound especially with Shimano Ultegra Hubs no clicking too. I just feel a lot better off on the TI it has zero flex but yet is not harsh and to me it is the best of steel ride in a much more powerful frame. Also I am totally against pressfit bottom brackets and buried cables. This bike takes nothing to put in new cables and I don['t see any gain in a CF bike except it might weigh less if you want to go that direction.
And of course there is not weight limit on this TI frame although a given wheelset might have a weight limit. I weight about 169 pounds but I am sure a 300 pounder would have not problem on a good well built sturdy wheelset.
Get a TI and your are done looking.