The Shibuya Excel Hotel used to be one of our fav hotels in Tokyo due to easy access from JR Shibuya station. However, due to the Shibuya city project massive constructions have been in progress for several years - thereby removing lifts/escalator access directly to the Shibuya Mark City.
If you want to avoid lugging heavy luggage down the long flight of stairs to Shibuya Mark City consider this option -
When we last stayed in Dec 2022 we exited the JR Shibuya station on 1F (street level) with escalators and lifts, head to the west exit where there is a JR East Travel Sevice Centre (in Green). Cross the narrow street Jingu-dori and turn right. The next block is Shibuya Mark City and look for the hotel entrance on 1F. Take lift to 5F where the hotel reception is.
Photo of the Shibuya Excel Hotel entrance on 1F.
https://www.tripadvisor.com/LocationPhotoDirectLink-g1066456-d307381-i254175238-Shibuya_Excel_Hotel_Tokyu-Shibuya_Tokyo_Tokyo_Prefecture_Kanto.html
JR Shibuya Station Map.
https://www.jreast.co.jp/e/stations/e808.html
Another option is to take limo bus from NRT where it terminates at the hotel entrance on 5F. However, that limo bus is less frequent than JR NEX trains, which ops once every 30 min roughly.