https://robertreed.bandcamp.com/album/sanctuary-i" rel="nofollow - https://robertreed.bandcamp.com/album/sanctuary-i

I'd also explore Pekka Pohjola.

If you like Oldfield's poppier 1980s stuff, and you definitely should, try a sweet album on Musea by ENGEL

COLIN MASSON's "Isle of Eight" is quite Oldfield influenced 

Sometimes sister SALLY OLDFIELD sounds cut from the same cloth and her album "Water Bearer" contains similar hypnotic tendencies

Stephen Caudel

he is in the PA Database so I won't list all his albums , although there aren't that many. Wine Dark Sea is the best imo.

Sally Oldfield has more than one album and a more recent album I just heard on Space Pirate Radio is excellent! 

To my ears, it is only "like Mike" in that his guitar is in it, and you hear one small solo and you know right away who it is!

yes I love Sally.  I have reviewed about 5 of her albums.  I mentioned the first because I think it might be of most interest to fans of her brother, but both "Easy" and "Celebration" are excellent albums as well.  At some point I'll move on to her more recent stuff!

Much of this album is acoustic and instrumental and not too dissimilar to the first part of side two of tubular bells imo(before the wolf man song and the naming of the instruments ).

That reminds me that a long time ago I was looking in a magazine that described this album that had only two songs on it and so it was compared to tubular bells and topographic oceans. For the longest time I couldn't remember what it was but I posted on here and I'm pretty sure it was you who mentioned Stephen Caudel's "wind dark sea" and that's when I realized that was probably the album I was thinking of. 

Anyway, I think MO also has some similiarities to Vangelis, Tangerine Dream and maybe some of the more acoustic and rock oriented new age artists(although I can't think of many specific ones off the top of my head). Mike Oldfield is actually only one of a few artists who could be considered the "father" of new age. Other contenders would be Popol Vuh, Jade Warrior, Deuter, Jean Michel Jarre, Mannheim Steamroller(first album was in 1975), Paul Winter, probably a bit of "krautrock", probably some ECM stuff, the aforementioned Tangerine Dream and even a few tracks by Happy the Man among others. 

I wanted to add something like CLEARLIGHT, but I keep thinking that it is too "classical" to be added to this listing ... Mike's stuff is not usually "classically minded" but it is way more "traditional" minded for my ears in that he might change something just because of an instrument that sounds different and appears to be playing something else ... in his earlier days, it was a sort of progression to simple to a bit more involved ... and that is not, exactly, a classical thing, as it was originally done way back when in Albinoni and Vivaldi days if history of music serves us well. In this sense, Mike is very "traditional" and "local" in his tastes. 

CLEARLIGHT and Cyrille Verdaux are (again) classical minded, but a check into other folks also doing synthesizer things, Germany had many of them doing stuff that was totally different, even with classical elements into it, but it was much more experimental ... I'm thinking of Eberhard Schoenner. And in many ways, harder to see and line out on a piece of paper, Edgar Froese, even with TD, is very classical in his style of developing and working a theme ... and this held up until his passing!

Listen to 6:10 - 6:40 for some extremely Oldfield-sounding guitar. 

A Japanese band calling itself "Asturias", which is a region in Spain and also the name of a famous composition by Isaac Albéniz, is totally weird.

https://youtu.be/PnB6u0I0RlA

or this:

https://soundcloud.com/paulmkollar/june

or this:

https://soundcloud.com/paulmkollar/jenny

Andy Salvanos - "Orbit" (2018)