2 of the most notable are Tertullian and Augustine.
Tertullian:
“Then, having taken the bread and given it to His disciples, He made it His own body, by saying, “This is my body,” that is, the figure of my body. A figure, however, there could not have been, unless there were first a veritable body. An empty thing, or phantom, is incapable of a figure.” -
Against Marcion Book 4, Chapter 40
newadvent.org/fathers/03124.htm
“He says, it is true, that “the flesh profits nothing;” but then, as in the former case, the meaning must be regulated by the subject which is spoken of. Now, because they thought His discourse was harsh and intolerable,
supposing that He had really and literally enjoined on them to eat his flesh, He, with the view of ordering the state of salvation as a spiritual thing, set out with the principle, “It is the spirit that quickens;” and then added, “The flesh profits nothing,”— meaning, of course, to the giving of life. He also goes on to explain what He would have us to understand by spirit: “The words that I speak unto you, they are spirit, and they are life.” In a like sense He had previously said: “He that hears my words, and believes in Him that sent me, has everlasting life, and shall not come into condemnation, but shall pass from death unto life.” Constituting, therefore, His word as the life-giving principle, because that word is spirit and life, He likewise called His flesh by the same appellation; because, too, the Word had become flesh, we ought therefore to desire Him in order that we may have life, and to devour Him with the ear, and to ruminate on Him with the understanding, and to digest Him by faith. Now, just before (the passage in hand), He had declared His flesh to be “the bread which comes down from heaven,” impressing on (His hearers) constantly under the figure of necessary food the memory of their forefathers, who had preferred the bread and flesh of Egypt to their divine calling” -
On the Resurrection of the Flesh - Chapter 37
newadvent.org/fathers/0316.htm
Augustine:
“Was not Christ once for all offered up in His own person as a sacrifice? And yet, is He not likewise offered up in the sacrament as a sacrifice, not only in the special solemnities of Easter, but also daily among our congregations; so that the man who, being questioned, answers that He is offered as a sacrifice in that ordinance, declares what is strictly true?** For if sacraments had not some points of real resemblance** to the things of which they are the sacraments, they would not be sacraments at all. In most cases, moreover,
they do in virtue of this likeness bear the names of the realities which they resemble. As, therefore, in a certain manner the sacrament of Christ’s body is Christ’s body, and the sacrament of Christ’s blood is Christ’s blood, in the same manner the sacrament of faith is faith.” - Letter 98 - Section 9
newadvent.org/fathers/1102098.htm
“Chapter 16.— Rule for Interpreting Commands and Prohibitions.
24. If the sentence is one of command, either forbidding a crime or vice, or enjoining an act of prudence or benevolence, it is not figurative. If, however, it seems to enjoin a crime or vice, or to forbid an act of prudence or benevolence, it is figurative. “Unless you eat the flesh of the Son of man,” says Christ, “and drink His blood, you have no life in you.” John 6:53 This seems to enjoin a crime or a vice;
it is therefore a figure, enjoining that we should have a share [communicandem] in the sufferings of our Lord, and that we should retain a sweet and profitable memory [in memoria] of the fact that His flesh was wounded and crucified for us.” -
On Christian Doctrine Book 3
newadvent.org/fathers/12023.htm
More Augustine -
earlychurchtexts.com/public/augustine_sermon_272_eucharist.htm
david.heitzman.net/sermons227-229a.html
Summary by 20th Century Patristic Scholar -
archive.org/stream/pdfy-CY7YNVnvFwggDjnT/103911481-J-N-D-Kelly-Early-Christian-Doctrines#page/n451/mode/2up
… He is hidden from elemental senses, and revealed to the Spiritual.