Whenever I do one of these I'm always sort of in a de facto way working off a list of players. And to be frank, until the player rankings make it no longer possible, everyone of these will begin with Kyler Murray in the 1st round, because I'm all-in on the player.
After that I'm usually picking between the following players, in order as they appear on Matt Miller's rankings:
QB: Easton Stick, (Drew Anderson)
RB: Josh Jacobs, David Montgomery, Rodney Anderson, Wes Hills, Nick Brossette, Darwin Thompson
WR: David Sills, Lil'Jordan Humphrey, Andy Isabella, Jalen Hurd, Terry McLaurin, Tyre Brady, Keelan Doss, Greg Dortch
TE: TJ Hockenson, Noah Fant, CJ Conrad, Trevon Wescoe
OT: Jawaan Taylor, Dalton Risner, Yodny Cajuste, Kaleb McGary, Chuma Edoga, Oli Udoh, Joshua Miles, Ethan Greenidge
OG: Cody Ford, Chris Lindstrom, Beau Benschawel, Ben Powers, Dru Samia
OC: Garrett Bradbury, Erik McCoy, Lamont Gaillard, (Nick Allegretti)
DL: Jeffery Simmons, Dexter Lawrence, Gerald Willis, Khaln Saunders, Renell Wren, Danny Wise
EDGE: Jachai Polite, Charles Omenihu, Ben Banogu, Malik Carney, Jordan Brailford, Justin Hollins
LB: Drue Tranquill, Khalil Hodge, Joe Dineen
CB: Rock Ya-Sin, JoeJuan Williams, Jimmy Moreland, Jamal Peters, Sheldrick Redwine, Mark Fields, Derrick Baity, Chris Westry
S: Taylor Rapp, Johnathan Abram, Nasir Adderley, Deionte Thompson, Juan Thornhill, Chauncey Gardner-Johnson, Jaquan Johnson, Mike Edwards, Mark McLaurin, Ugo Amadi, Andrew Wingard
Guys in (parentheses) absolutely SHOULD be on Matt Miller's list, but have yet to make the cut. I will say that Matt's latest iteration has put a lot more of these guys on there. For the longest time I wouldn't be able to find a Joshua Miles or Ugo Amadi. Now it's just Drew Anderson and Nick Allegretti missing.
For the most part you will not see 1st round prospects in the above lists because, as I said, until the rankings make it no longer possible, my Fanspeak mocks begin with Kyler Murray.
Note that some of Matt Miller's rankings (e.g. Jeffery Simmons) make it seem highly unlikely this player is available in the 2nd-3rd round, etc. But I don't ONLY use Matt Miller's rankings for my Fanspeak mocks. I use a smattering of them and have tried to identify guys that keep being available and that my eye keeps falling on when they are. I've only just listed them in Matt Miller's ordering above because I can't be bothered right now to list them in my own order of preference.
I keep adding names as I go, of course. Clearly there are some positions I just haven't been bothered with thus far.