Consider these texts:
Dan 8:5 And as I was considering, behold, an he goat came from the west on the face of the whole earth, and touched not the ground: and the goat had a notable horn between his eyes.
Dan 8:6 And he came to the ram that had two horns, which I had seen standing before the river, and ran unto him in the fury of his power.
Dan 8:7 And I saw him come close unto the ram, and he was moved with choler against him, and smote the ram, and brake his two horns: and there was no power in the ram to stand before him, but he cast him down to the ground, and stamped upon him: and there was none that could deliver the ram out of his hand.
This was literally fulfilled in Alexander III The Great's battle with Darius III Codomannus and his armies.
Gabriel specifically tells us who the "notable horn" on the "He-goat" is, and who it came after:
Dan 8:19 And he said, Behold, I will make thee know what shall be in the last end of the indignation: for at the time appointed the end shall be.
Dan 8:20 The ram which thou sawest having two horns are the kings of Media and Persia.
Dan 8:21 And the rough goat is the king of Grecia: and the great horn that is between his eyes is the first king.
The first King of said empire that was "very great", even greater than Medo-Persia's "great" empire, was that which was ruled by Alexander III The Great, which parallels Daniel 2, 7 and 11.
Daniel 2:
1. Gold = Babylon
2. Silver = Medo-Persia
3. Brass = Greece/Javan
4. Iron = Rome
Daniel 7:
1. Lion = Babylon
2. Bear = Medo-Persia (conquered 3, raised up)
3. Leopard = Greece/Javan (divided into four, wings to fly)
4. Terrible Beast = Rome
Daniel 8:
1. (Babylon not in the vision)
2. Ram = Medo-Persia (conquered 3, raised up)
3. He-Goat = Greece/Javan (divided into four, touched not the ground)
4. Little Horn = Rome
Daniel 10:
1. Babylon
2. Medo-Persia (Darius/Cyrus)
3. Greece
4. (Rome not mentioned)
Daniel 11:
1. (Babylon not in Daniel 11, as it parallels 8)
2. Medo-Persia
3. Greece (divided)
4. Rome (vs 20)
So what do you mean that Daniel 8 doesn't represent Alexander? Even the general commentaries all cite this as Alexander III The Great, for instance see -
Daniel 8:21 -
Daniel 8:21, commentary:
Albert Barnes - "... And the great horn that is between his eyes is the first king - Alexander the Great ..."
John Gill - "... and the great host that is between his eyes is the first king; this is Alexander ..."
Commentary Critical and Explanatory - "... the first king ... Alexander ..."
Scofield's reference Notes - "... first king i.e. Alexander the Great. ..."
Mathew Poole - "... The first king, i.e. Alexander the Great; ..."
E. W. Bullinger - "...is the first king = representeth the first king: i.e. Alexander the Great (Daniel 8:5). ..."
Daniel 8:5, commentary:
Adam Clarke - "... Behold, a he-goat - This was Alexander the Great; ..."
Coffman's Commentary - "... The great central horn of the he-goat stands for Alexander himself. ..."
Geneva Study Bible - "... Meaning Alexander ..."
Wesley's Explanatory Notes - "... A horn — This was Alexander the great. ..."
Jean Calvin's Commentary - "... As the Greeks were situated to the west, of Persia, the Prophet says, the he-goat came from the west, and went over the surface of the whole earth These words signify the very extensive dominion of Alexander, ..."
John Trapp Commentary - "... And the goat had a notable horn between his eyes.] This notable horn is Alexander, founder of the Grecian monarchy. ..."
Thomas Coke Commentary - "... It is also remarkable, that Alexander's son by Roxana was named Alexander AEgus, or the son of the goat. Alexander himself ordered the statuaries to represent him with a horn upon his head ... And the he-goat had a notable horn between his eyes. This horn, says the angel, is the first king, or kingdom, of the Greeks, in Asia, which was erected by Alexander the Great ..."
Peter Pett's Commentary - "... The notable horn was no doubt Alexander the Great. ..."
Whedon's Commentary - "... This he-goat was the Grecian empire impersonated in Alexander the Great (Daniel 8:21) ..."
Dr. Thomas Constable's Commentary - "... Alexander the Great is clearly the conspicuous horn. ..."
Joseph Benson's Commentary - "... “This horn, says the angel, is the first king, or kingdom, of the Greeks in Asia, which was erected by Alexander the Great ..."
Bishop Newton's Commentary - "... “This horn, says the angel, is the first king, or kingdom, of the Greeks in Asia, which was erected by Alexander the Great ..."
George Haydock's Commentary - "... A notable horn. Alexander the great. (Challoner) ..."
Richard Challoner's Commentary - "... A notable horn. Alexander the great. ..."
Ellicott's Commentary - "... An he goat.—This, according to Daniel 8:21, means the Greek empire, the large horn being the first king, or Alexander the Great. ..."
Treasury Of Scripture Knowledge - "... or, none touched him in the earth. a notable horn. Heb. an horn of sight. Alexander the Great. 8,21; 11:3 ..."
So, what do you mean in regards Daniel 8???
No one said he did.
Alexander III the Great also proclaimed himself a "god" in Egypt (south, worldliness, secularism) and later in Babylon (north, false religion), therein dying. He in type represents the kingdom of satan, and satan himself.