A workflow involving Adobe Bridge is as follows. If you have Premiere Pro, you probably installed Bridge, if not, please do install.
- Put your batch of clips in a folder. I would use a directory structure like
Client Name > Jobs > YYYY_MM_DD > Footage
etc.
- Find your footage in Bridge.
- Select all your footage, then under
Tools
menu select Batch Rename (Shift + Command (Control) + R

- In your Batch Rename settings, change destination folder to something like
Renamed
, next to your footage folder (to keep everything organised). Under New Filenames
just select Sequence Number
, add 1 and select Three or Four digits. This will rename your files 0001.mov, 0002.mov etc.

- From Premiere, render a black video with a length you wish or a black
frame with the same resolution and pixel aspect ratio with your
footage. You will need to duplicate the black footage as much as you
need. Rename them with Bridge, this time add a letter a to the
end of filename, and rename in the same folder.

- Back in Premiere, import all the footage in your footage folder, including blacks. In your bin panel, sort them by name, they should be sorted in the following order:
0001.mov, 0001a.mov(or png), 0002.mov, 0002a.mov
. Select them all and drag to your timeline. They should be placed as you wish, a video clip followed by a black clip.
If you are using still images as blacks, adjust their default length in Premiere's Preferences > General > Still Image Default Duration
option.
If the videos are always in the same specs, you can re-use those blacks, by duplicating and renaming again.
Still not the shortest way, but kind of better??